Array Problem

This is a discussion on Array Problem within the C++ Programming forums, part of the General Programming Boards category; Hey Guys, I'm having trouble with this one project i'm doing..I'm new to Arrays, and I'm trying to figure out ...

  1. #1
    Registered User ProgrammingDlux's Avatar
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    Array Problem

    Hey Guys, I'm having trouble with this one project i'm doing..I'm new to Arrays, and I'm trying to figure out where I'm going wrong, but to no avail.

    My task is to ask how many scores will be input, Then using a loop, enter each test score (Must be at least 6), average and find the largest. I'm having trouble with the logistics i guess.. any advice?

    #include <iostream.h>
    #include <stdlib.h>

    main()
    {int Num, Test[What do i put here?], C, Sum=0; float Avg;

    cout<<"\nHow Many Test Scores do you want to enter?- You Must enter at least 6: ";cin>>Num;

    for(C=0;C<=Num;C++)
    {cout<<"\n Enter Score "<<C<<": "; cin>>Test[C];
    Sum=Sum + Test[C];
    }
    Avg=Sum/Num;

    system("PAUSE");
    return 0;
    }

  2. #2
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    I'm proud to say: I think I know the answer to the first question: 5. One less than the number of elements, which is 6, you say?
    Self Learner--patience required

  3. #3
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    Get your user input for the number of scores first, then declare the array.

  4. #4
    Something Clever ginoitalo's Avatar
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    ======================
    Declare :

    int *TestScores;
    int num;
    ======================
    Usage :

    cout<<"enter # of scores";
    cin>>num;

    TestScores=new int[num];

    // then TestScores[3]=99;
    ======================

  5. #5
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    ginoitalo is right, you'll have to use memory
    allocation but at the end of the program you'll have to delete it.
    ======================
    Declare :
    int *TestScores;
    int num;
    ======================
    Usage :
    cout<<"enter # of scores";
    cin>>num; //if user types in 10

    TestScores = (int*)malloc(sizeof(int) * num; //<--
    //TestScores will become an array of 10

    //at the end of program
    free(TestScores);

    ======================

  6. #6
    Unregistered
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    well you could do declare an array of say onethousand and limit size of user input so you don't need to use dynamic memory if you have never used that before. Otherwise, if you have no control over size of user input, then use of dynamic memory is the ticket.

    int array[1000];
    int index = 20000;

    while(index < 6 || index > 1000)
    {
    cout << "You may enter from 6 - 1000 scores. enter number of scores now. " << endl;
    cin >> index;
    }

  7. #7
    Registered User ProgrammingDlux's Avatar
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    Thanks Guys, I appreciate your help.

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