Hi, I am very new to programming its something ive always been meaning to do and ive started following tutorials. I have written a little test code for input/output. But everytime I run the program and I type in the age it closes the window. Could you help?

 

#include <iostream>
using namespace std;

void main(void)

{

     int Age = 0;

     /* We are setting the value of the variable 'Age' to '0' */

     cout << "How old are you?: ";
     cin >> Age;
     cout << "You are " << Age << "years old" << endl;

}

 

It isnt like I am too bothered if I can get this working or not but I would want to know what is wrong for future programs I create. Thanks for any help in advance.

First off, make your main return int (Noone argue about this, it's STANDARD).

Then, at the bottom (just before '}'), add the following:

 

cin.sync();
cin.get();

return 0;

 

That will make it look like this, with some more small modifications:

 

#include <iostream>
using namespace std;

int main(int argc, char* argv[], char* envp[])
{

     int Age = 0;

     /* We are setting the value of the variable 'Age' to '0' */

     cout << "How old are you?: ";
     cin >> Age;
     cout << "You are " << Age << " years old" << endl;

     cin.sync();
     cin.get();

     return 0;
}

This is the code now:

 

#include <iostream>
using namespace std;

int main(int argc, char* argv[], char* envp[])
{

     int Age = 0;

     /* We are setting the value of the variable 'Age' to '0' */

     cout << "How old are you?: ";
     cin >> Age;
     cout << "You are " << Age << " years old" << endl;

     cin.sync();
     cin.get();

     return 0;
}

 

and it still doesnt work :(

It does for me. <-- Standard programmers reply :P

well can you give me a link to the program you use please, to compile and write your program, cheers

Dev-Cpp [http://www.bloodshed.net/], uses MingW (Windows GCC port).

Yeah Dev-Cpp owns.

 

I've never seen a second char pointer in the main function before... I know the first refers to the arguments given in the command line, but what's the second one for?

Quote from a C++ reference:

 

envp contains a pointer to a nil-terminated array of null-terminated strings, containing the environment variables passed to the program by the OS. It is not available on all systems.

#include <iostream>
using namespace std;

int main()
{
     int Age = 0;

     /* We are setting the value of the variable 'Age' to '0' */

     cout << "How old are you?: ";
     cin >> Age;
     cout << "You are " << Age << " years old" << endl;
}

 

i quickly looked over this and nothing is wrong with this code, it does wat its suppose to and then quits, thats y its hard to see the "You are <AGE> years old"

 

do wat ViperX said and add in cin.sync(); and cin.get()

i dont know wat sync() does but cin.get() waits for u to press enter

#include <iostream>
using namespace std;

int main()
{

     int Age = 0;

     /* We are setting the value of the variable 'Age' to '0' */

     cout << "How old are you?: ";
     cin >> Age;
     cout << "You are " << Age << "years old" << endl;
     
     system("PAUSE");
     return EXIT_SUCCESS;

}

 

try that