#include <stdint.h>

uint32_t x = 1, y =2, z[10];
uint32_t *ip;

char * ptr = "informatyk\0";

int strlen ( char *s ) {
    int n;

    for (n = 0; *s != '\0'; s++) {
        n++;
    }

  return n;
}

int main () {

    ip =&x;
    y = *ip;
    *ip = 0;

    ip = &z[0];

    x = strlen (ptr) ;   

  return 0;
}