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

CareerCup1.2.cpp

#include "stdafx.h"
#include <string>
#include <iostream>


void reverse(char*);
int main()
{
  using namespace std;
	char str[] = "This is a test";
	int size = strlen(str);
	reverse(str);
	cout<<str<<endl;
	return 0;
}
void reverse(char* str)
{
	char *start = str;
	char *end = start+strlen(str)-1;

	while(start<end)
	{
		char temp = *end;
		*end = *start;
		*start=temp;
		start++;
		end--;
	}
}