Question

我的家庭作业存在问题而且我的教授没有回应。如何让我的数组返回getHighest和getLowest函数的月份字符串名称？

它一直告诉我必须添加更多细节，我从中移除了代码，所以我现在只剩下主要的getLowest和getHighest函数。它说我还需要更多细节，所以我输入这个以添加更多细节，以便我可以提交我的问题。

提前谢谢！

#include <iostream>
#include <string>   
#include <iomanip>
using namespace std;

//Function prototypes
void getRainfall(double[], int);  //To retrieve the user input.
double getTotal(double[], int);  //To total the rainfall amounts.
double getAverage(double[], int);  //To get the average rainfall.
double getLowest(double[], int, int&);  //Returns the lowest value, provides                 the index of the lowest value in the last parameter.
double getHighest(double[], int, int&); //Returns the highest value,     provides the index of the highest value in the last parameter.

//Global Variable
const int NUM_MONTHS = 12;

//Array names
double rainfall[NUM_MONTHS];
string month[NUM_MONTHS] = { "January", "February", "March", "April", "May",     "June", "July", "August", "September", "October", "November", "December" };         //Month array to hold names of months

int main()
{
    //Declare variables
    double  total, average;
    int low, high;
    string lowMonth, highMonth;

    //Call Functions
    getRainfall(rainfall, NUM_MONTHS);  //To retrieve the user input.
    total = getTotal(rainfall, NUM_MONTHS); //To total the rainfall amounts.
    average = getAverage(getTotal, NUM_MONTHS);  //To get the average rainfall.
    lowMonth = getLowest(rainfall, NUM_MONTHS, low);  //Returns the lowest value, provides the index of the lowest value in the last parameter.
    highMonth = getHighest(rainfall, NUM_MONTHS, high); //Returns the highest value, provides the index of the highest value in the last parameter.

    //Display the following:
    cout << "The total rainfall for the year is: " << total << endl;
    cout << "The average rainfall for the year is: " << fixed << showpoint << setprecision(2) << average << endl;
    cout << "Least amount of rainfall fell in: " << highMonth << endl;
    cout << "Most amount of rainfall fell in: " << lowMonth << endl;

    return 0;
}


//*******************************************************************************************
//              double getLowest(double amount[], int size)                                 *
//  Returns the lowest value, provides the index of the lowest value in the last parameter. *
//*******************************************************************************************

double getLowest(double amount[], int NUM_MONTHS, int &low)
{
    low = amount[0];  //Variable to hold lowest value.
    int lowMonth = 0; //Set low value to intial rainfall value.  //Variable to return month element location.

    for (int index = 0; index < NUM_MONTHS; index++)  
    {
        if (amount[index] < low)
        {
            low = amount[index];
            lowMonth = index;
        }
    }

    return lowMonth;
}

//*********************************************************************************************
//              double getHighest(double amount[], int size)                                  *
//  Returns the highest value, provides the index of the highest value in the last parameter. *
//*********************************************************************************************

double getHighest(double amount[], int NUM_MONTHS, int &highMonth)
{
    //high = amount[0];  //Variable to hold highest value
    months = amount[0];
    double highMonth = 0; //Variable to hold highest value

    for (int index = 0; index < NUM_MONTHS; index++)    
    {
        if (amount[index] > high)
        {
            highMonth = amount[index];
            months = index;
        }
    }

    return highMonth;
}

Answer 1

所以你的问题非常清楚，你的代码完全混乱，但我想你希望函数getHighest也返回一个带有月份名称的字符串？
好吧，一个函数只能返回一种类型的变量，但你可以用引用来做：

double getHighest(double amount[], int NUM_MONTHS, int &highMonth, string &name)
{
    //high = amount[0];  //Variable to hold highest value
    months = amount[0];
    double highMonth = 0; //Variable to hold highest value

    for (int index = 0; index < NUM_MONTHS; index++)    
    {
        if (amount[index] > high)
        {
            highMonth = amount[index];
            months = index;
            name = month[index];
        }
    }
    return highMonth;
}

但通常你的代码有一些缺陷：例如覆盖 highMonth可能会导致问题，为什么会传递NUM_MONTHS，即使它是全局定义的？我并不完全明白为什么这段代码过于复杂。我还认为getHighest和getLowest功能甚至无法正常工作。作为一种更好的方法，我尝试这样的函数：

double getHighest(double amount[], string &name)
{
    double highest = 0;
    double highPos = 0;
    for(unsigned int i = 0; i < NUM_MONTHS; i++)
    {
        if(highest <= amount[i])
        {
            highest = amount[i];
            highPos = i;
        }
    }
    name = month[highPos];
    return highest;
}

编辑：或者，如果您只想返回字符串，可以这样做：

字符串和名称） { // high = amount [0]; //变量以保持最高值月=金额[0]; double highMonth = 0; //变量保持最高值

    for (int index = 0; index < NUM_MONTHS; index++)    
    {
        if (amount[index] > high)
        {
            highMonth = amount[index];
            months = index;
            name = month[index];
        }
    }
    return highMonth;
}

但通常你的代码有一些缺陷：例如覆盖 highMonth可能会导致问题，为什么会传递NUM_MONTHS，即使它是全局定义的？我并不完全明白为什么这段代码过于复杂。我还认为getHighest和getLowest功能甚至无法正常工作。作为一种更好的方法，我尝试这样的函数：

string getHighest(double amount[], string &name)
{
    double highest = 0;
    double highPos = 0;
    for(unsigned int i = 0; i < NUM_MONTHS; i++)
    {
        if(highest <= amount[i])
        {
            highest = amount[i];
            highPos = i;
        }
    }
    name = month[highPos];
    return name;
}

Parallel Arrays如何将int转换为字符串

1 个答案: