icp/oer/courses/c-basics/sections/03-functions/10-static/program.c

#include <stdio.h>
void counter()
{
    static int i = 0;
    i++;
    printf("I was called %d times.\n", i);
}

int main(int argc, const char *argv[])
{
    for (int x = 0; x < 20; x++)
    {
        counter();
    }
}