Reverse String C++ using char array

Question

I wrote a simple C++ program to reverse a string. I store a string in character array. To reverse a string I am using same character array and temp variable to swap the char

Answer 1

//reverse a string
#include
using namespace std;

int strlen(char * str) {
  int len = 0; 
  while (*str != '\0') {
    len++;
    str++;
  }
  return len;
}

void reverse(char* str, int len) {
  for(int i=0; i