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

int main(int, char *argv[])
{
    char* a = NULL, *tmp = NULL;
    tmp = malloc(strlen(argv[0]));
    if (tmp != NULL)
    {
        a = tmp;
        strcpy(a, argv[0]);
    }
    free(a);
    printf("%s\n", a);
}