Some programs won't compile

[jarble]

I tried to a run a small program from an online tutorial, but web-cpp won't compile it:

#include <cstdio>

int main()
{
    int x = 5;
    char my_name[] = "Lincoln";

    printf("x = %d \n", x);
    printf("My name is %s \n", my_name);
    
    return 0;
}

Instead, it prints an error message:
[error] : Error: no main function found