[CC150][1.2] Implement a function void reverse(char* str) in C or C++ which reverses a null-terminated string.

reverseString.cpp

#include <iostream>
using namespace std;

void reverseString(char *str) {
	char *start = str;
	for (;*str;str++); //loop to '\0' terminal of the string
	if (*start) str--; //in case string is blank
	while (start < str) {
		*start ^= *str;  //swap two elements using XOR
		*str ^= *start;
		*start++ ^= *str--;
	}
}


int main() {
	char str[] = "";
	cout << str << endl;
	reverseString(str);
	cout << str << endl;
	return 0;
}