C - Help please

I'm just starting to learn some programming and i'm using Dev-C++ to compile my programs. I can't work out why the following won't work, especially seeing as system("pause"); has worked in other programs:

/* Demonstrates using multiple return statements in a function. */

#include <stdio.h>

int x, y, z;

int larger_of(int a, int b);

int main()
{
puts("Enter two different integer values: ");
scanf("%d%d", &x, &y);

z = larger_of(x, y);

printf("\nThe larger value is %d.", z);
system("pause");
return 0;

}

int larger_of(int a, int b)
{
if(a>b)
return a;
else
return b;
}



I get an error message:

17 `system' undeclared (first use this function)

Can someone please tell me whats wrong - i'm probably being really stupid! I've tried using get(), getch(), getchar(), cin.get() all out of desperation but can't get anything to work!

There's a library you have to include to be able to use the 'system()' call. I can't remember what it is offhand, I've used it in C++ but it's been ages ago.

If you've used it in other programs, check your headers on those source files.

You need to add

#include <stdlib.h>

btw, the system("pause"); is a pretty stupid crutch.

Just open a cmd terminal and run the program from there, and your output won't vanish.

You are expecting too much from windows user .
:P

EDIT:
I mean to expect from windows user to start it from cmd.

By using C, he's shown he's willing to learn... :-)