如何使用struct C ++获得函数内部生成的最大值

Question

So I'm trying to display the account with the highest generated interest but for some reason it isn't working? Any help is much appreciated. The errors I'm getting are to do with the if statement at the bottom.

#include "stdafx.h"

#include <iostream>

using namespace std;

const int MAXACCOUNTS = 8;

struct Account
{
    int AccountNumber;
    double Balance;
    int DaysSinceDebited;
    double Interest;
};

int main()

{
    double highestInterest = 0;
    int highestInterestAccountIndex;

    Account accounts[MAXACCOUNTS] = { {1001,4254,40,20},{7940,27006.25,35},{4382,123.50,2},{2651,85326.92,14},{3020,657.0,5},{7168,7423.34,360},{6245,4.99,1},{9342,107864.44,45} };

    for (int index = 0; index < MAXACCOUNTS; index++)
    {
        if (accounts[index].Balance > 10000 || accounts[index].DaysSinceDebited > 30)
        {
            accounts[index].Interest = accounts[index].Balance * 0.06;
        }
        else
        {
            accounts[index].Interest = accounts[index].Balance * 0.03;
        }

        cout << "Account number: " << accounts[index].AccountNumber << " Balance: " << accounts[index].Balance << " Interest Paid: " << accounts[index].Interest << endl;

    }

    for (unsigned int index = 0; index < MAXACCOUNTS; index++)
    {
        accounts[index] = { AccountNumber[index], Balance[index], DaysSinceDebited[index] };

        double increment = CalcInterest(accounts[index]);

        if (increment >= highestInterest)
        {
            highestInterest = increment;
            highestInterestAccountIndex = index;
        }
    }

    std::cout << "The account that generated the greatest interest was account " << accounts[highestInterestAccountIndex].accountNumber << " With a total interest of " << highestInterest;


    system("pause");

    return 0;
}

I have to do it in this format as well, using the struct but I cant figure out where I'm going wrong.

Answer 1

Get rid of these lines:

    accounts[index] = { AccountNumber[index], Balance[index], DaysSinceDebited[index] };
    double increment = CalcInterest(accounts[index]);

You already filled in accounts[index] when you initialized it at the beginning of main() . There are no arrays named AccountNumber , Balance , or DaysSinceDebited , those are only members of the Account struct.

And there's no function CalcInterest() , the interest is already in the structures. So you can change that second line to simply:

double increment = accounts[index].Interest;

You also have a typo: accounts[highestInterestAccountIndex].accountNumber in the last cout line should be accounts[highestInterestAccountIndex].AccountNumber .