Thread: Beginner. Help with displaying highest and lowest numbers

well in addition to calculate the sum, you need to calculate minimum score and maximum score (by comparing current score to the currently stored minimum and maximum)

Ad print these values after the loop ends

Start with thinking of how you would solve the problem of displaying the highest number input. Clearly, you must first determine what is the highest number input. How would you go about doing that?

By the way, as I mentioned in your other thread, you should avoid global variables. Declare those variables in the main function instead.

You have the right idea, but you need to define the variables before the loop and then print their final values after the loop.

What is your current code?

This is how I might write your program:

Code:

#include <iostream>

using namespace std;

int main()
{
    cout << "We are going to display the grades for 10 test scores\n";

    int sum = 0;
    int max = 0;
    int min = 9999;

    for (int z = 0; z < 10; z++)
    {
        cout << "Please enter a test score\n";
        double score;
        cin >> score;

        sum += score;

        if (score < min)
        {
            min = score;
        }
        if (score > max)
        {
            max = score;
        }

        if (score >= 90)
        {
            cout << "Your score is A\n";
        }
        else if (score >= 80)
        {
            cout << "Your score is B\n";
        }
        else if (score >= 70)
        {
            cout << "Your score is C\n";
        }
        else if (score >= 60)
        {
            cout << "Your score is D\n";
        }
        else
        {
            cout << "Your score is F\n";
        }
    }

    int average = sum / 10;

    cout << "\nThe average score was" << average << endl;
    cout << "The lowest score is " << min << endl;
    cout << "The highest score is " << max << endl;
}

Notice that:

• I moved your variable declarations into the main function. In fact, I followed the rule of thumb that variables should be declared near first use.
• I moved the code that checks for score < min and score > max into the loop body. You need to do this comparison on every iteration otherwise you would only ever be checking the very last score entered with 0 and 9999.
• I used blank lines to group parts of the code, but I did not overuse them.

By the way, did you really intend for integer division when you wrote sum / 10, and is the average really supposed to be an int rather than a double?