#include<stdio.h>

       #include<string.h>

       void fun(char ss[]);

       void main {

           char s[15]="0123456789";

           fun(s);

           printf("%s
",s);

       }

       void fun(char ss[]) {

           int i, n=strlen(ss) ;

           for(i=0; i<n/2; i++) {

               char c=ss[i];

               ss[i]=ss[n-1-i];

               ss[n-1-i]=c;

           }

       }