To start, create the following sample source code file and save it as
hello.c.
The following sections show you how to compile
this file to form an executable and how to run it.
#include <stdio.h>
int a, c;
static void
foo (int b)
{
c = a + b;
printf ("%d + %d = %d\n", a, b, c);
}
int
main (void)
{
int b;
a = 3;
b = 4;
printf ("Hello, world!\n");
foo (b);
return 0;
}