C语言交换字符串

#include <stdio.h>

int main() {
   char s1[] = TajMahal;     
   char s2[] = Dazzling;     
   char ch;

   int index = 0;

   //Character by Character approach

   printf(Before Swapping - \n);
   printf(Value of s1 - %s \n, s1);
   printf(Value of s2 - %s \n, s2);

   while(s1[index] != '\0') {
      ch = s1[index];
      s1[index] = s2[index];
      s2[index] = ch;
      index++;
   }

   printf(After Swapping - \n);
   printf(Value of s1 - %s \n, s1);
   printf(Value of s2 - %s \n, s2);

   return 0;
}