#include <iostream>
using namespace std;
 int zoma(char* string)
 {  int counter=0;
     for (int i=0;string[i]!='\0';i++)
     {
         counter++;
     }
     return counter;
 }
 char* shecvla(char*string,char symbol,int pozicia)
   {
     int size =zoma(string);
         pozicia--;
         cout <<" size "<< size <<endl;
       if (pozicia>=0 && pozicia<=size)
      {

       string[pozicia]=symbol;

       return string;

      }

       else
       {  string="error out of range";
           return string;
       }

   }
int main()
{
    int pozicia;
    char string[100];
    char symbol;
    cout<<"sheyvane stringi:";
    cin>>string;
cout <<" sheyvane symbolo: " ;
cin>>symbol;
cout<<"sheyvane pozicia chanacvlebis : ";
cin>>pozicia;


 char * changed=shecvla(string,symbol,pozicia);

     cout<<changed;

    return 0;
}