Free function question

Question

I was practicing free function and I wrote this piece of code

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

int main() {
int *ptr;
ptr = malloc(10*sizeof(*ptr)); /* a block of 10 ints */
if (ptr != NULL)
*(ptr+2) = 50; /* assign 50 to third int */
printf("%d\n", *(ptr+2)); /* 50 */

free(ptr);
printf("%d\n", *(ptr+2));
return 0;
}

I expected the output to come as
50
(and a random number)

but the output screen showed "No output."
Can anyone explain how the code is running?

Answer 1

Your code is working. The problem is the Sololearn server. Sometimes it doesn't respond that's why it only shows 'No output'. Just try it a few more times.

Answer 2

Me have notice that problem too...