Min/Max Numbers

Hi all,

I just started a C++ class and have figured out that I can't quit my day job! I have a simple problem - figure out the average, minimum, and maximum numbers for a list of numbers that I enter with -1 to end the listing.

I have been struggling for 3 days on how to get the min & max numbers. I have tried a few diferent things, but I just can't think it out in my head in a logical code way!

Now I can't even get the average to work - it WAS working before I started in again trying to do the min & max.

Any assistance would be greatly appreciated. I don't want anyone to do it for me, but an explanation of how I can accomplish this would be great! The code I have altered at least 50 times is below.

thanks mz

Code:

//"This program calculates the average score, minimum score and maximum score."

#include <iostream.h>
void main()


{	float tscore=0.0, sumscore = 0.0, count = 0.0, average;
//	int minscore, maxscore;

	cout <<"Enter a list of positive values (ending with  -1):";
	cin >> tscore; 

//		for (maxscore=minscore=tscore; tscore > -1;); {
//			if (tscore < minscore) 
//				minscore = tscore;
//				else if (tscore > maxscore) 
//					maxscore = tscore;  }
		while (tscore > 0.0)
		sumscore = sumscore + tscore;
		count = count + 1;
		cin >> tscore;


	average = sumscore / count;
	cout << "The average is :"  <<average << endl;
//	cout << "The minimum score is :"  <<minscore << endl;
//	cout << "The maximum score is :"  <<maxscore << endl;

}

PS It is always good to try new things, if for nothing else, to see how some things just aren't for you.

Originally posted by mzt

Code:

		for (maxscore=minscore=tscore; tscore > -1;); {
//			if (tscore < minscore) 
//				minscore = tscore;
//				else if (tscore > maxscore) 
//

sorry but i didnt understand this code

why didnt you use while instead of for??

trythe following code

Code:

#include<iostream>
using namespace std;
int main()
{
   int count=0;
   double score,sum,av,max,min;  sum=0.0;
   cout<<"enter student's score : "<<endl;
   cin>>score;
   max=min=score;
   while(score>0)
     {  
         if(score>max)
            max=score;
         if(score<min)
            min=score;
         sum+=score;
         count++;
         cout<<"enter student score :";
         cin>>score;
    }
       
  av=sum/count;
  cout<<"average :"<<av <<endl;
  cout<<"maximum : "<<max<<endl;
   cout<<"minimum : " <<min<<endl;
}   
      
 return 0;
}

i didnt run it on my compiler but i hope it works