Thread: expected identifier

He did not explicitly add a return statement. Under C99, this is ok, but under C89, you must include a return:

Code:

#include <stdio.h>

int main (void) {
    int ruu = 10000;
    int var = 0;
    while (var <= ruu)
    {
        printf("%i\n", var);
        var++;
    }
return 0;
}