How do you reverse a string in place in C or C++?

Question

How do you reverse a string in C or C++ without requiring a separate buffer to hold the reversed string?

Answer 1

Yet another:

#include 
#include 

int main(int argc, char **argv) {

  char *reverse = argv[argc-1];
  char *left = reverse;
  int length = strlen(reverse);
  char *right = reverse+length-1;
  char temp;

  while(right-left>=1){

    temp=*left;
    *left=*right;
    *right=temp;
    ++left;
    --right;

  }

  printf("%s\n", reverse);

}