Reverse string

#include < stdio.h >

#include<conio.h>

#include < string.h >

  int main()
{
  char arr[100];

  printf("Enter a string to reverse\n");
  gets(arr);

  strrev(arr);

//strrev(string) : reverses given sting
  printf("Reverse of entered string is \n%s\n",arr);

getch();

}