如何使用 struct C++ 从函数中获取最高值

Question

所以我试图显示产生兴趣最高的帐户，但由于某种原因它不起作用？任何帮助深表感谢。我遇到的错误与底部的 if 语句有关。

#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;
}

我也必须以这种格式使用结构，但我不知道哪里出错了。

Answer 1

去掉这些行：

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

你在main()开头初始化的时候已经填好了accounts[index]。没有名为AccountNumber、Balance 或DaysSinceDebited 的数组，它们只是Account 结构的成员。

并且没有函数CalcInterest()，兴趣已经在结构中。因此，您可以将第二行更改为：

double increment = accounts[index].Interest;

您还有一个错字：最后一行cout 中的accounts[highestInterestAccountIndex].accountNumber 应该是accounts[highestInterestAccountIndex].AccountNumber。