sizeof-dynamically-allocated-cstring.md

If a c-str is created dynamically (calloc/malloc), we can't get it's memory size dynamically in any way. :'(

http://stackoverflow.com/questions/419022/char-x256-vs-char-malloc256sizeofchar

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

int main()
{
    
    char a[512];
    char *b = (char*) calloc(1, 512);
    
    printf("%d %d %d\n", sizeof(a), sizeof(b), sizeof(*b));

    return 0;
}

512 8 1