Variable Sized Arrays vs calloc in C

Question

On the discussion of dynamic memory here: \"Intro to C Pointers and Dynamic Memory\"

The author states:

A memory block like this can effective

Answer 1

Variable-length automatic arrays are allowed in ISO C99, and as an extension GCC accepts them in C90 mode and in C++. So, don't foget to set compiler flag -std=c99 or -std=gnu99. Following example will work

#include

int main()
{
    int n;
    printf("\n\tEnter the number of digits: ");
    scanf("%d", &n);

    char str[n];
    for(int i=0; i < n; i++) {
        scanf("%s", &str[i]);
    }

    printf("\n\tThe entered digits are: %s", str);
return 0;
}

I garantee that :-)