This code that is supposed to get the largest and average of input numbers is not giving me the desi-CodePudding

I've been trying to get this code to give me an output of "20 9.50" when I input "15 20 0 3 -1" but it keeps giving me the output "20 0.55". This is the code I've made:

#include <iostream>
#include <iomanip>
using namespace std;

int main() {

   int largest = 0;
   int number = 0;
   int count = 0;
   double avg = 0;
   
   while (number >= 0) {
      cin >> number;
      if (number >= 0) {
         if (number > largest) {
            largest = number;
         }
         avg  = number;   count;
      }
      if (count > 0) {
         avg /= count;
      }
   }
   cout << largest << " " << fixed << setprecision(2) << avg << endl;

   return 0;
}

Can anyone point out how I'm getting the wrong output? I'm in a class for C but I'm still new to it. Hopefully I'm not treated too harshly, any help is appreciated.

CodePudding user response：

I am not sure if you are supposed to maintain the average "on the fly".

The better, less error-prone, approach is to maintain a total for the life of the loop. Then, after the while loop, you should average by dividing the total by the count.

FYI, for everyone else: The -1 ends the while loop and total & count should not include the -1 at the ending of every input.

The following code gives output of 20 9.50 with input of 15 20 0 3 -1.

#include <iostream>
#include <iomanip>
using namespace std;

int main() {

   int largest = 0;
   int number = 0;
   int count = 0;
   double avg = 0;
   double total = 0;

   while (number >= 0) {
      cin >> number;
      if (number >= 0) {
         if (number > largest) {
            largest = number;
         }
         //avg  = number;   count;
         total  = number;   count;
      }
      //if (count > 0) {
      //   avg /= count;
   }
   
   avg = total / count;
   cout << largest << " " << fixed << setprecision(2) << avg << endl;

   return 0;
}

CodePudding user response：

You divide avg by count several times. But you must do it one more after cycle

#include <iostream>
#include <iomanip>
using namespace std;

int main() {

    int largest = 0;
    int number = 0;
    int count = 0;
    double avg = 0;

    while (number >= 0) {
        cin >> number;
        if (number >= 0) {
            if (number > largest) {
                largest = number;
            }
            avg  = number;   count;
        }
        
    }
    if (count > 0) {
        avg /= count;
    }
    cout << largest << " " << fixed << setprecision(2) << avg << endl;

    return 0;
}