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

    void first(char **t)
    {
        *t = malloc(5*sizeof(char));
    }
    
    int main(int argc, char * argv[])
    {
        char * t = NULL;
        printf("%p\n", t);
        first(&t);
        printf("%p\n", t);
        return 0;
    }