c++ - 尝试将数组作为参数传递，出现 double[4] 到 double 转换错误

Question

该程序应该使用函数来获取四个地区销售数据的输入，然后确定最高的并显示两者。一切都编译得很好，直到我编写了最后一个函数 FindHighest。我试图将销售数组(我从 GetSales 收集的数据)传递到 FindHighest 并确定数组的最大数量并计算该信息。

编译时出现的错误是 错误 1 ​​错误 C2664: 'FindHighest' : 无法将参数 1 从 'double [4]' 转换为 'double' g:\cis5\week6\week6\problem3.cpp 31 1 Week6

这是代码:

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

double GetSales(string);
void FindHighest(double);
void Validate(double&, string);

const int NUMBER_OF_REGIONS = 4;
const string REGION[NUMBER_OF_REGIONS] = {"Northeast", "Southeast", "Northwest", "Southwest"};

int main(){ 
    double sales[NUMBER_OF_REGIONS] = {0.0};

    //This loop calls the function GetSales as it proceeds forward through the REGION array
    for (int i = 0; i < 4; i++){
        sales[i] = GetSales(REGION[i]);
    }

    FindHighest(sales);

    cin.ignore();
    cin.get();
    return 0;
}


//This function receives the region as a string and gathers the sales figure as input. It also calls the function Validate to vaildate that the sales figure is over $0.0
double GetSales(string region){
    double sales = 0.0;

    cout << "\nWhat is the total sales for " << region << " division: ";
    cin >> sales;
    Validate(sales, region);

    return sales;
}

//This function receives the sales figures as an array and determines which division had the highest sales and displays the name and amount
void FindHighest(double sales[]){
    string region = "";
    double highestSales = 0.0;

    for (int i = 0; i < NUMBER_OF_REGIONS; i++){
        if (sales[i] > highestSales){
            highestSales = sales[i];
            region = REGION[i];
        }
    }

    cout << fixed << showpoint << setprecision(2);
    cout << "The " << region << " division had the highest sales with a total of $" << highestSales;
}

//This function validates the sales input from the GetSales function
void Validate(double &sales, string region){
    while (sales < 0){
        cout << "I am sorry but this cannot be a negative number." << endl;
        cout << "Please enter a positive sales figure for " << region << " division: ";
        cin >> sales;
    }
}

Answer 1

您的问题位于您声明的顶部 void FindHighest(double);

这与 FindHighest 的定义不符。