Simple CPP Game Applications for finding a number

#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
/*
This program plays a simple game.The computer picks a random number
from
0 to 100, and the user tries to guess the number.
*/
const int totchan=7;
void main()
{
 int number;        //the computer's random number
 int guess;         //the user's guess
//chanscor stores score for 1successful chance.
int chances=0,score=0,chanscor;       
char ans;
 do
 { clrscr();
   chances=score=0;
   cout<<"\nWelcome to the High/Low game.";
   cout<<"I will pick a random number from 0 to 100."<<endl;
   cout<<"You must try to guess the number."<<endl;
   randomize();
   number=(int)(rand()%100);
   chanscor=100/totchan;        //score for each successful chance
   do
   {
     cout<<"What is your guess? (0 to 100) "<<endl;
     cin>>guess;
     if((guess<0)||(guess>100))
     {
    cout<<"Sorry, but your guess "<<guess<<"must be from 0 to 100."<<endl;
     }
     else if(guess < number)
     {
    cout<<guess<<" is low.Try a higher number."<<endl;
     }
     else if(guess > number)
     {
    cout<<guess<<" is high.Try a lower number."<<endl;
     }
     else       
     {   
                      //if correct number is guessed
        //number is correct, and the "do" loop will end below
    cout<<guess<<" is correct. Congratulations!"<<endl;
    score=chanscor*(totchan-chances);   //score calculated for number ofchances left
    cout<<"Your score is "<<score<<endl;
        break;
     }
     chances++;
     if(guess!=number)
     cout<<"Now you have "<<totchan-chances<<"chances left."<<endl;
     if(chances==totchan)
     { cout<<"Only "<<totchan<<"chances are allowed.Better luck nexttime";
       cout<<"The actual number was "<<number<<endl;
       break;
     }
     }while (guess!=number);
     cout<<"Thank you for playing High/Low!"<<endl;
     cout<<"Want to play it again? (y/n)..."<<endl;
     cin>>ans;
   }while(ans=='y' || ans=='Y');
 }

Sample Output :

Welcome to the High/Low game.I will pick a random number from 0 to 100.
You must try to guess the number.
What is your guess? (0 to 100)
56
56 is high.Try a lower number.
Now you have 6chances left.
What is your guess? (0 to 100)
28
28 is low.Try a higher number.
Now you have 5chances left.
What is your guess? (0 to 100)
36
36 is low.Try a higher number.
Now you have 4chances left.
What is your guess? (0 to 100)
46
46 is high.Try a lower number.
Now you have 3chances left.
What is your guess? (0 to 100)
40
40 is correct. Congratulations!
Your score is 42
Thank you for playing High/Low!
Want to play it again? (y/n)...