Simple C program to reverse the given characters.

reverse_characters.c

#include<stdio.h>
main()
{ 
char char1='X';
char char2='M';
char char3='L';
printf("\n the reverse of %c%c%c is %c%c%c\n", char1,char2,char3,char3,char2,char1);
getch();
return 0;
}