}
                                              else{
                                                   printf(" \b");
                                                   surname[cntr]='\0';
                                                   cntr--;
                                                   goto cc;
                                                   }
                                  }
                                  else{
                                       surname[cntr]=nput;
                                       cntr++;
                                       if(cntr>14){
                                                    goto aa;
                                                    }
                                                    else
                                                    goto cc;
                                       }
                      }
    aa:
    gotoxy(40,14);
    printf("%s %s",urname,surname);
    fullname[cntr]='\0';


{    
     char choice;
     ron:
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),11);
   gotoxy(35,15);
    printf(" Do you want to enter  ");
   gotoxy(35,16);
    printf(" another entry?        ");
   gotoxy(35,17);
    printf("                       ");
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),116);
   gotoxy(40,17); 
    printf("YES");
   gotoxy(50,17);
    printf("NO");
    choice= getche();
   if (choice=='y'){
   goto start;
}
  if (choice=='n'){
   printf("");
}
   else 
   goto ron;
}




}


void gotoxy(int x, int y){
     COORD coord = {x,y};
     SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);


     }

example output:

Please Enter your name : Ron
Please Enter your Surname : Smash
Your name is : r.Smash

// just an example that i input my name Ron and a surname Smash
my question is how to make the output in Your name is : is only
r.Smash

Is that just a random piece of code you found?

In your code proper.

cout << "Your name is: " << firstmame[0] << "." << surname << endl;

I assume this is Turbo C?
From K&R "The C programming language" second edition page 65:

3.8 Goto and Labels
C provdes the infinitely-abusable goto statement, and labels to branch to.
Formally, the goto is never necessary, and in practice it is almost always easy to write code without it.

Suggestion: look up a C tutorial on the net and learn how to use printf and strings to start with.
Forget about goto and join the 21st century!