small strlen test

stlen.c

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

void
print_length(char *s)
{
    size_t len = strlen(s);
    printf("Unhappy?: %ld\n", len);
}

int
main(void)
{
    char *base = "Unhappy, world! Unhappy, world!";
    char *dest;

    dest = malloc(100);
    strcpy(dest,base);
    
    print_length(dest);

    return 0;
}