div tool

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, const char *const *const argv)
{
    if (argc == 2)
    {
        const char *p = strchr(argv[1], '/');
        if (p)
        {
            int num = atoi(argv[1]), denom = atoi(p+1);
            if (denom)
            {
                printf("%f\n", (double)num/(double)denom);
            }
        }
    }
    return(0);
}