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

// How to use void* without typecasts.
//
// DO NOT USE TYPECASTS UNLESS YOU CAN ARTICULATE WHY IT IS NECESSARY AND SAFE.
//
// When you might need a typecast:
// - inside a calculation, when the type conversion is needed on an intermediate value
//   within the calculation.  Avoid this, unless you are very sure.
// - calling printf("%p", (void*))
//
// DO NOT USE A TYPECAST JUST TO SILENCE A GCC ERROR -- That will create a bigger problem.
//
// For HW10: You never need a typecast.  They can make some code shorter (on your screen),
// but they are never necessary.

void print_compare_result(void const* a_lhs, void const* a_rhs) {
    char* s1 = a_lhs;  // you can assign directly from a void* to a ▒* without a typecast.
    if(strlen(a_lhs) < strlen(a_rhs)) {
        //                    └─ you can pass a void* for a parameter of type ▒*
        //                       without a typecast
        printf("*a_lhs is shorter\n");
    }
    else {
        printf("*a_lhs is not shorter\n");
    }
}

int main(int argc, char* argv[]) {
    char* s1 = "abc";
    char* s2 = "defghi";

    void* a_lhs = s1; // you can assign directly from an ▒* to a void* without a typecast.
    print_compare_result(a_lhs, s2);
      //                        └─you can pass an ▒* for a parameter of type void*
      //                          without a typecast
    //print_compare_result(s1, s2);
    return EXIT_SUCCESS;
}
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