C++ Tutorials - Absolute n00b spoonfeed

Huh, I can be wrong, but noone used ?: operator

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// Proj2_Stat.cpp: Another 5 cents for this project solution...
// Best regards, AntidotE.

// Needed remark: "I... personally believe, thaaat..." (c) ;) 0 is non-positive and non-negative.

#include <iostream>
#include <cmath> //for using abs
using namespace std;

int main()
{
   int n1, n2;
   char ask = 'y';
   cout << "Hello, this is Project2 solution hereinafter named 'Stat'..." << endl << endl;
   cout << "  First of all, Stat'd like to note, that here is NO defence from fools :(" << endl;
   cout << "    That's why you have to be precisely sure what you are typing." << endl;
   do
   {
      cout << endl;
      cout << "Stat asks for FIRST number => ";
      cin >> n1;
      cout << "Stat asks for SECOND number => ";
      cin >> n2;
      cout << endl << "Stat answers: " << endl;
      
      cout << n1 << " and " << n2 << " are" << ( ( n1 != n2 ) ? " not " : " " ) << "equal!" << endl;
      cout << ( ( n1 > n2 ) ? n1 : n2 ) << " is > than " << ( ( n1 > n2 ) ? n2 : n1 ) << endl;
      cout << ( ( n1 < n2 ) ? n1 : n2 ) << " is < than " << ( ( n1 < n2 ) ? n2 : n1 ) << endl;
      cout << n1 << " is" << ( ( n1 >= n2 ) ? " " : " not " ) << ">= than " << n2 << endl;
      cout << n1 << " is" << ( ( n1 <= n2 ) ? " " : " not " ) << "<= than " << n2 << endl;
      cout << n1 << " is " << ( ( n1 % 2 ) ? "odd" : "even" ) << endl;
      cout << n2 << " is " << ( ( n2 % 2 ) ? "odd" : "even" ) << endl;
      cout << n1 << " is " << ( ( n1 > 0 ) ? "positive" : ( ( n1 < 0 ) ? "negative" : "zero" ) ) << endl;
      cout << n2 << " is " << ( ( n2 > 0 ) ? "positive" : ( ( n2 < 0 ) ? "negative" : "zero" ) ) << endl;
      cout << "difference between " << n1 << " and " << n2 << " is " << abs( ( n1 > n2 ) ? ( n2 - n1 ) : ( n1 - n2) ) << endl;
      cout << n1 << " / " << n2 << " = " << (double)( (double)n1 / (double)n2 ) << endl;
      cout << n2 << " / " << n1 << " = " << (double)( (double)n2 / (double)n1 ) << endl;

      cout << endl;
      cout << "Stat asks: 'Would you like to try one more time?'" << endl;
      cout << "  ('y' is yes, everything else is no) => ";
      cin >> ask;
   } while ( ask == 'y' );
   return 0;
}

and some example of output:

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Hello, this is Project2 solution hereinafter named 'Stat'...

  First of all, Stat'd like to note, that here is NO defence from fools :(
    That's why you have to be precisely sure what you are typing.

Stat asks for FIRST number => 5
Stat asks for SECOND number => -8

Stat answers:
5 and -8 are not equal!
5 is > than -8
-8 is < than 5
5 is >= than -8
5 is not <= than -8
5 is odd
-8 is even
5 is positive
-8 is negative
difference between 5 and -8 is 13
5 / -8 = -0.625
-8 / 5 = -1.6

Stat asks: 'Would you like to try one more time?'
  ('y' is yes, everything else is no) =>

cool use of ?:

though as you can see, it can sometimes be unhelpful to code clarity and cleanliness. use with caution.

antiRTFM wrote:cool use of ?:

though as you can see, it can sometimes be unhelpful to code clarity and cleanliness. use with caution.

surely, I understand it and before putting it into one line, I write (keep in mind) something like this:

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( n1 % 2 ) ?   // is result in () "not 0" (means true)?
  ( "odd" )  : // yes it is true!
  ( "even" ) ; // no, it's false ("0")!


then write it this way:

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( n1 % n2 ) ? ( "odd" ) : ( "even" )

and put it wherever it needed to be used...

also, I keep in mind, that "?:" can return only one type (it is defined by "true" section), so the following code cannot be compiled:

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( n1 % n2 ) ? ( "odd" ) : ( 10 ) // WRONG!!!

if structure is more complicated, then I continue to use indentations:

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( n1 > 0 ) ?         // is this true?
   ( "positive" ) :  // yes!
   ( ( n1 < 0 ) ?    // no! Let's check another! is this true?
         "negative" :  // yes!
         "zero" )      // no!

generally, brackets (err, I hope, I named "()" correctly, my English is so far from even advanced...) help out:

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( ( n1 > 0 ) ? ( "positive" ) : ( ( n1 < 0 ) ? "negative" : "zero" ) )

im new to c++ this is what i came up with but i don't know how to get a floating point number from the devision of two integers

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#include <iostream>

using namespace std;

int main()
{
    int num1, num2;
    bool mainBool = true;
    string chose;


    cout << "enter a number" << endl;
    cin >> num1;
    cout << "enter a number" << endl;
    cin >> num2;

    if (num1 == num2)
    {
        cout << "numbers are equal" << endl;
    }
    else
    {
        if (num1 > num2)
        {
            cout << num1 << " is greater than " << num2 << endl;
            cout << num2 << " is less than " << num1 << endl;
        }
        else
        {
            cout << num2 << " is greater than " << num1 << endl;
            cout << num1 << " is less than " << num2 << endl;
        }
    }

    if (num1 % 2 == 0)
    {
        cout << num1 << " is even " << endl;
    }
    if (num2 % 2 == 0)
    {
        cout << num2 << " is even " << endl;
    }
    if (num1 >= 0 )
    {
        cout << num1 << " is positive " << endl;
    }
    else
    {
        cout << num1 << " is negative " << endl;
    }
    if (num2 >= 0)
    {
        cout << num2 << " is positive " << endl;
    }
    else
    {
        cout << num2 << " is negative " << endl;
    }

    cout << "the difference is " << endl;
    if (num1 > num2)
    {
        cout << num1 - num2 << endl;
    }
    else if (num1 == num2)
    {
        cout << "0" << endl;
    }
    else
    {
        cout << num2 - num1 << endl;
    }






    }











burgert wrote:im new to c++ this is what i came up with but i don't know how to get a floating point number from the devision of two integers

I literally just read how to to that

you need to prefix your int variables with the type you wish to change it to...... for example .....

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int a = 5;
int b = 2;

cout << (float)a / (float)b;

This will change 'a' and 'b' into floating point types before the calculation is made, im really new to c++ myself so i cant tell you how it works exactly, suffice to say it works
good luck!

edit: forgot i came here to put my efforts of project 2 up for everyone to see. Here it is...

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#include "stdafx.h"
#include <iostream>
using namespace std;


int main()
{
   int num1;
   int num2;
   char restart;

   cout << "Welcome to the number statistics program" << endl;
   cout << "Please give me a number.....\n";
   cin >> num1;
   cout << "And a second number to compare to.....\n";
   cin >> num2;

   cout << endl << endl;



if (num1 != num2)
   cout << "Good, you picked two different numbers.\n";
else
   cout <<"The numbers you picked are the same.\n";



if (num1 < num2)
   cout << num2 << " is greater than " << num1 << endl;
else
   cout << num1 << " is greater than " << num2 << endl;

if (num1 > num2)
   cout << num2 << " is less than " << num1 << endl;
else
   cout << num1 << " is less than " << num2 << endl;

if (num1 >= num2)
   cout << num1 << " is greater than or equal to " << num2 << endl;
else
   cout << num1 << " is not greater than or equal to " << num2 << endl;

if (num2 >= num1)
   cout << num2 << " is more than or equal to " << num1 << endl;
else
   cout << num2 << " is not more than or equal to " << num1 << endl;

if (num1 <= num2)
   cout << num1 << " is less than or equal to " << num2 << endl;
else
   cout << num1 << " is not less than or equal to " << num2 << endl;

if (num2 <= num1)
   cout << num2 << " is less than or equal to " << num1 << endl;
else
   cout << num2 << " is not less than or equal to " << num1 << endl;

if (num1 % 2)
   cout << num1 << " is odd" << endl;
else
   cout << num1 << " is even" << endl;

if (num2 % 2)
   cout << num2 << " is odd" << endl;
else
   cout << num2 << " is even" << endl;

if (num1 >= 0)
   cout << num1 << " is positive" << endl;
else
   cout << num1 << " is negative" << endl;

if (num2 >=0)
   cout << num2 << " is positive" << endl;
else
   cout << num2 << " is negative" << endl;

if (num1 <= num2)
   cout << "The difference between these two numbers is " << (num2 - num1) << endl;
else
   cout << "The difference between these two numbers is " << (num1 - num2) << endl;

cout << num1 << '/' << num2 << '=' << ((float)num1 / (float)num2) << endl;
cout << num2 << '/' << num1 << '=' << ((float)num2 / (float)num1) << endl << endl << endl;

cout << "Would you like to start the program again to test two different numbers [y/n]?" << endl;
cin >> restart;

if (restart == 'y')
   main();



int a;
cin >> a;
return 0;
}

pipey85: thats called "casting", you are casting an int to float. I speak about casting a bit in some video but i guess ill talk more about it some other time.

Everything looks great in your code- besides where you call main(). main() is a special function which is where your program begins. You dont call main() from within your code. Use loops instead (have you learned about loops yet?)

Here's my version of the project:

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#include <iostream>
using namespace std;

int main()
{
   int value1;
   int value2;

   cout << "Enter first value: ";
   cin >> value1;

   cout << "Enter second value: ";
   cin >> value2;

   if (value1 == value2)
   {
      cout << "The values are equal.\n";
      cout << value1 << " = " << value2 << endl;
   }
   else if(value1 > value2)
   {
      cout << value1 << " is larger.\n" << value2 << " is smaller.\n";
      cout << value1 << " > " << value2 << endl;
   }
   else if(value1 < value2)
   {
      cout << value2 <<" is larger.\n" << value1 << " is smaller.\n";
      cout << value1 << " < " << value2 << endl;
   }

   if(value1 >= value2)
      cout << value1 << " >= " << value2 << endl;   
   if(value1 <= value2)   
      cout << value1 << " <= " << value2 << endl;
   
   if(!(value1 % 2))
      cout << value1 << " is even.\n";
   else
      cout << value1 << " is odd.\n";
   if(!(value2 % 2))
      cout << value2 << " is even.\n";
   else
      cout << value2 << " is odd.\n";

   if (value1 > 0)
      cout << value1 << " is positive.\n";
   else if (value1 < 0)
      cout << value1 << " is negative.\n";
   else
      cout << value1 << " is neither negative nor positive. It is 0.\n";

   if (value2 > 0)
      cout << value2 << " is positive.\n";
   else if (value2 < 0)
      cout << value2 << " is negative.\n";
   else
      cout << value2 << " is neither negative nor positive. It is 0.\n";


   cout << value1 << " - " << value2 << " = " << value1 - value2 << endl;
   cout << value2 << " - " << value1 << " = " << value2 - value1 << endl;

   cout << value1 << " / " << value2 << " = " << value1 / value2;
   if (value1 % value2)
      cout << " remainder " << value1 % value2 << endl;
   else
      cout << endl;

   cout << value2 << " / " << value1 << " = " << value2 / value1;
   if (value2 % value1)
      cout << " remainder " << value2 % value1 << endl;
   else
      cout << endl;

   char f;
   cin >> f;
   return 0;
}

Thanks for the pointer antiRTFM, ive had a busy couple of days and im just picking up loops at the moment.

One hr. i am done

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#include "stdafx.h"



#include <iostream>
#include <cmath>

using namespace std;

int main()
{
   int FirstNumber;
   int SecondNumber;
   

   cout << "Please enter your first number: ";
   cin >> FirstNumber;
   cout << "Please enter your second number: ";
   cin >> SecondNumber;

   cout << "\nTEST 1: Greater or Less than. \n" << endl;

   if (FirstNumber == SecondNumber)
   {
      cout << "They are equal \n" << endl;
      cout << FirstNumber << " is equal to " << SecondNumber << endl;
   }
   else
   {
      cout << "They are not equal" << endl;

      if (FirstNumber < SecondNumber)
      {
         cout << FirstNumber << " is less than or equal to " << SecondNumber << endl;
      }
      
      if (FirstNumber > SecondNumber)
      {
         cout << FirstNumber << " is greater than or equal to " << SecondNumber << endl;
      }
   }

   cout << "\nClick Enter to begain Test 2 ..." << endl;
   system ("pause");

   cout << "\nTEST 2: Even or Odd. \n" << endl;
   
   if ((FirstNumber % 2) == 0)
   {
      cout << "The first number (" << FirstNumber <<") your enter is EVEN" <<endl;
   }
   else
   {
      cout << "The first number (" << FirstNumber <<") your enter is ODD" <<endl;
   }

if ((SecondNumber % 2) == 0)
   {
      cout << "The second number (" << SecondNumber <<") your enter is EVEN" <<endl;
   }
   else
   {
      cout << "The second number (" << SecondNumber <<") your enter is ODD" <<endl;
   }

cout << "\nClick Enter to begain Test 3 ..." << endl;
system ("pause");

cout << "\nTEST 3: Positive or Negative. \n" << endl;

if (FirstNumber > 0)
   {
      cout << "The first number (" << FirstNumber <<") your enter is POSITIVE" <<endl;
   }
   else
   {
      cout << "The first number (" << FirstNumber <<") your enter is NEGATIVE" <<endl;
   }

if (SecondNumber > 0)
   {
      cout << "The second number (" << SecondNumber <<") your enter is POSITIVE" <<endl;
   }
   else
   {
      cout << " The second number (" << SecondNumber <<") your enter is NEGATIVE" <<endl;
   }

cout << "\nClick Enter to begain Test 4 ..." << endl;
system ("pause");

cout << "\nTEST 4: Difference and dividing. \n" << endl;

cout << "(" << FirstNumber << ")" << " - " << "(" << SecondNumber << ")" <<  " = " << FirstNumber - SecondNumber << endl;

double a;
double b;

a = FirstNumber;
b = SecondNumber;


cout << "(" <<a << ")" << " / " << "(" << b << ")" << " = " << a/b << endl;


char YN;

cout << "\nAll test are complete, do you like to test again (y/n)" << endl;
cin >> b;

if ( YN == 'y')
{
   cout << "" << endl;
   return main();
}

else
{
   return 0;
}

   char f;
   cin >> f;
   return 0;
}

@realgamer686: Good job! just one thing: you don't call main(). Ever.
Wait till you learn about loops.

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#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
   
    int firstnumber;
    int secondnumber;
   
    cout << "Please input a number:";
    cin >> firstnumber;
    cout << "Please input another number:";
    cin >> secondnumber;
   
    if (firstnumber < secondnumber){
    cout << firstnumber <<" is greater then\n" << secondnumber;}
    if (secondnumber < firstnumber){
      cout << secondnumber <<" is greater then\n" << firstnumber;}
    if (firstnumber == secondnumber){
           cout << firstnumber <<" is equal too\n"<< secondnumber;}
    if (firstnumber < 0)
                cout << firstnumber << " is even\n";
    if ( firstnumber >0 )
                     cout << firstnumber << " is odd\n";
    if (secondnumber < 0)
                          cout << firstnumber << " is even\n";
    if ( secondnumber >0 )
                              cout << firstnumber << " is odd\n";
   
   
   
   
   
    if ((firstnumber % 2)== 0){
       cout << firstnumber <<" is even \n";}
       else {
       cout << "Number is odd";}
   
   
   
   
   
   
    system("PAUSE");
    return EXIT_SUCCESS;
}


this is mine

build in Loop technology

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    #include "stdafx.h"



    #include <iostream>

    using namespace std;

    int main()
   {
      for (;;)
      {
         int FirstNumber;
         int SecondNumber;
      
          

         cout << "Please enter your first number: ";
         cin >> FirstNumber;
         cout << "Please enter your second number: ";
         cin >> SecondNumber;

         cout << "\nTEST 1: Greater or Less than. \n" << endl;

         if (FirstNumber == SecondNumber)
         {
           cout << "They are equal \n" << endl;
           cout << FirstNumber << " is equal to " << SecondNumber << endl;
         }
         else
         {
           cout << "They are not equal" << endl;
          

           if (FirstNumber < SecondNumber)
           {
             cout << FirstNumber << " is less than or equal to " << SecondNumber << endl;
           }
            
           if (FirstNumber > SecondNumber)
           {
             cout << FirstNumber << " is greater than or equal to " << SecondNumber << endl;
           }
         }

         cout << "\nClick Enter to begain Test 2 ..." << endl;
         system ("pause");

         cout << "\nTEST 2: Even or Odd. \n" << endl;
          
         if ((FirstNumber % 2) == 0)
         {
           cout << "The first number (" << FirstNumber <<") your enter is EVEN" <<endl;
         }
         else
         {
           cout << "The first number (" << FirstNumber <<") your enter is ODD" <<endl;
         }

      if ((SecondNumber % 2) == 0)
         {
           cout << "The second number (" << SecondNumber <<") your enter is EVEN" <<endl;
         }
         else
         {
           cout << "The second number (" << SecondNumber <<") your enter is ODD" <<endl;
         }

      cout << "\nClick Enter to begain Test 3 ..." << endl;
      system ("pause");

      cout << "\nTEST 3: Positive or Negative. \n" << endl;

      if (FirstNumber > 0)
         {
           cout << "The first number (" << FirstNumber <<") your enter is POSITIVE" <<endl;
         }
         else
         {
           cout << "The first number (" << FirstNumber <<") your enter is NEGATIVE" <<endl;
         }

      if (SecondNumber > 0)
         {
           cout << "The second number (" << SecondNumber <<") your enter is POSITIVE" <<endl;
         }
         else
         {
           cout << " The second number (" << SecondNumber <<") your enter is NEGATIVE" <<endl;
         }

      cout << "\nClick Enter to begain Test 4 ..." << endl;
      system ("pause");

      cout << "\nTEST 4: Difference and dividing. \n" << endl;

      cout << "(" << FirstNumber << ")" << " - " << "(" << SecondNumber << ")" <<  " = " << FirstNumber - SecondNumber << endl;

      double a;
      double b;

      a = FirstNumber;
      b = SecondNumber;

      cout << "(" <<a << ")" << " / " << "(" << b << ")" << " = " << a/b << endl;


      char c;

      cout << "\nAll test are completed. do you like to test again? (y/n)";
      cin >> c;
      cout << "" << endl;

      if( c  == 'y')
      {
         continue;
      }
      else
      {
         break;
         return 0;
      }
   }
}

Here is my second project, sorry about calling main() but I havent got so far in videos yet for loops. I know they are like for (a; a < 30; a++) {etc,etc} and while loop which name makes sense like while something is happening do something

Here is code (bit long)

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#include "stdafx.h"

#include <iostream>
#include <string>

using namespace std;

int main()
{
   int Number1;
   int Number2;
   system("Color 9");
   int startagain();



   cout << "Hello and welcome to my second project.\nThis will tell you something about two numbers that you type in." << endl;
   cout << "Enter your first number ( It can be also negative ): ";
   cin >> Number1;
   cout << "First number entered! Enter second one now: ";
   cin >> Number2;
   cout << "Okay, both numbers are entered here are some facts about them" << endl;
   cout << endl;
   cout << endl;



   if ( Number1 > Number2 )
   {
      cout << "-First number " <<"( " << Number1 << " ) is bigger than second number " << "( " << Number2 << " )" << endl;
   }
   else if ( Number2 > Number1 )
   {
      cout << "-Second number " <<"( " << Number2 << " ) is bigger than first number " << "( " << Number1 << " )" << endl;
   }
   else if ( Number1 == Number2 )
   {
      cout << "-First number " <<"( " << Number1 << " ) and second number " << "( " << Number2 << " )" << " equals" << endl;
   }




   if ( Number1 < Number2 )
   {
      cout << "-First number " <<"( " << Number1 << " ) is smaller than second number " << "( " << Number2 << " )" << endl;
   }
   else if ( Number2 < Number1 )
   {
      cout << "-Second number " <<"( " << Number2 << " ) is smaller than first number " << "( " << Number1 << " )" << endl;
   }




   if ( Number1 <= Number2 )
   {
      cout << "-First number " <<"( " << Number1 << " ) is less than or equals second number " << "( " << Number2 << " )" << endl;
   }
   else if (Number2 <= Number1 )
   {
      cout << "-Second number " <<"( " << Number2 << " ) is less than or equals first number " << "( " << Number1 << " )" << endl;
   }



   if ( Number1 >= Number2 )
   {
      cout << "-First number " <<"( " << Number1 << " ) is greater than or equals second number " << "( " << Number2 << " )" << endl;
   }
   else if ( Number2 >= Number1 )
   {
      cout << "-Second number " <<"( " << Number2 << " ) is greater than or equals first number " << "( " << Number1 << " )" << endl;
   }

   if ( (Number1 % 2) == 0 )
   {
      cout << "-First number " << "( " << Number1 << " )" << " is even" << endl;
   }
   else
   {
      cout << "-First number " << "( " << Number1 << " )" << " is odd" << endl;
   }





   if ( (Number2 % 2) == 0 )
   {
      cout << "-Second number " << "( " << Number2 << " )" << " is even" << endl;
   }
   else
   {
      cout << "-Second number " << "( " << Number2 << " )" << " is odd" << endl;
   }



   if ( Number1 < 0 )
   {
      cout << "-First number " << "( " << Number1 << " )" << " is negative" << endl;
   }
   else
   {
      cout << "-First number " << "( " << Number1 << " )" << " is positive" << endl;
   }


   if ( Number2 < 0 )
   {
      cout << "-Second number " << "( " << Number2 << " )" << " is negative" << endl;
   }
   else
   {
      cout << "-Second number " << "( " << Number2 << " )" << " is positive" << endl;
   }


   if ( Number1 > Number2 )
   {
      cout << "-The difference between these two number is " << Number1 - Number2 << endl;
   }
   else
   {
      cout << "-The difference between these two number is " << Number2 - Number1 << endl;
   }

   
   
   cout << "-First number " <<"( " << Number1 << " ) divided by second number " << "( " << Number2 << " )" << " is " << Number1 << " / " << Number2 << " = " << ((double) Number1 / Number2) << endl;
   cout << "-Second number " <<"( " << Number2 << " ) divided by first number " << "( " << Number1 << " )" << " is " << Number2 << " / " << Number1 << " = " << ((double) Number2 / Number1) << endl;
   startagain();
}

   int startagain()
   {
      string answer;

      cout << "Do you want to start again? ( Yes or no ) ";
      cin >> answer;

      if ( answer == "yes" || answer == "Yes" )
      {
         main();
      }
      else if ( answer == "no" || answer == "No" )
      {
         goto End;
      }
      else if ( answer != "yes" && answer != "no" )
      {
         cout << "Please give proper command!" << endl;
         startagain();
      }


End:

   return 0;

   }


#include "stdafx.h"
#include <iostream>

using namespace std;


int a;
int b;


int main ()
{


cout << "Input first integer number: ";
cin >> a;
cout << "Input second integer number: ";
cin >> b;

if (a == b)
{
cout << a << " is equal to " << b; }

if ( a != b)
{
if ( a <= b)
{
cout << b << " is greater than " << a << endl; }
if ( a >= b)
{
cout << a << " is greater than " << b << endl; }
}


if ( (a % 2) == 0 )
{
cout << a << " is even number" << endl; }
else
{
cout << a << " is odd number" << endl; }

if ( (b % 2) == 0 )
{
cout << b << " is even number" << endl; }
else
{
cout << b << " is odd number" << endl; }


if ( a < 0) { cout << a << " is negative" << endl;}
else { cout << a << " is positive" << endl;}
if ( b < 0) { cout << b << " is negative" << endl;}
else { cout << b << " is positive" << endl;}


if ( a <= b)
{
cout << "The difference between " << a << " and " << b << " is " << b-a << endl;}
else {cout << "The difference between " << a << " and " << b << " is " << a-b << endl;}

double e;
e = a/b;
cout << a << " divided " << b << " is " << e;
cout << " and the remainder is " << a%b <<endl;




char z;
cout << "Please type (X) to continue: ";
cin >> z;

return 0;
}




****** Note: Please review my codes. One thing I cant get it to do is that if first number is small than second one and try to divide; it'll come out to be zero. I have used float and double, still it didnt work. I just start programming 2 days ago. I did this only after I viewed 23 tutorials. I have seen others code, they seem to be more advance than mine. Am I not getting it, or they saw more of the tutorials. I also felt that I used too many 'if'; if you can clean it up a little for me to gain better understandings. Thanks,

if you can email me it'll be good. Thanks again, Please comments!!!