Question

我正在使用我班级的结构，在此我们要求创建一个列出四个变量的结构，并允许用户为我们记录的每个变量输入数字，并找出每年的总降雨量，平均值月份，最高和最低总体（及其出现次数）。我的主要问题是从我的getHot函数的getInfo函数中获取数据，以找到具有高温的月份。

 #include <iostream>
    using namespace std;

//weather structure

    struct WeatherData
    {
        double rainfall;
        double highestTemperature;
        double lowestTemperature;
        double averageTemperature;
    };
    //prototypes
    WeatherData getInfo();
    double getHot(WeatherData *);
    double getCold();

    int main()
    {
        WeatherData seattle;
        enum monthName { JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER };
        double totalRainfall = 0;
        double maxTemperature;
        double minTemperature;
        double averageTemperature;

        seattle = getInfo();
        for (int index = JANUARY; index <= DECEMBER; index++)
        {
            totalRainfall += seattle.rainfall;
        }

        seattle.averageTemperature = (totalRainfall) / 12;
        getHot(& seattle);

        system("pause");
        return 0;
    }
    // My getInfo function records all the information from user
    WeatherData getInfo()
    {
        WeatherData tempData;
        double totalRainfall = 0;
        enum monthName { JANUARY, FEBRUARY, MARCH, APRIL, MAY, JUNE, JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER };
        for (int index = JANUARY; index <= DECEMBER; index++)
        {
            cout << "Enter the total rainfall in month " << (index+1) << " (greater than or equal to zero) : " << endl;
            cin >> tempData.rainfall;
            cout << "rainfall " << tempData.rainfall;
            while (tempData.rainfall < 0)
            {
                cout << "This is an invalid input, enter a number equal to or greater than zero : " << endl;
                cin >> tempData.rainfall;

            }
            cout << "Enter the highest temperature in month " << (index + 1) << " (less than or equal to 140) : " << endl;
            cin >> tempData.highestTemperature;
            while (tempData.highestTemperature > 140)
            {
                cout << "This is an invalid input, enter a number equal to or less than 140 : " << endl;
                cin >> tempData.highestTemperature;

            }
            cout << "highest " << tempData.highestTemperature;
            cout << "Enter the lowest temperature in month " << (index + 1) << " (greater than or equal to -100) : " << endl;
            cin >> tempData.lowestTemperature;
            while (tempData.lowestTemperature < -100)
            {
                cout << "This is an invalid input, enter a number equal to or greater than -100 : " << endl;
                cin >> tempData.lowestTemperature;
            }
            cout << "lowest " << tempData.lowestTemperature;
            totalRainfall += tempData.rainfall;
        }
        tempData.averageTemperature = (tempData.lowestTemperature + tempData.highestTemperature) / 2;
        return tempData;
    }
    //having difficulty here figuring out how to get the contents of getInfo and return it to the main 
    double getHot(WeatherData * getInfo)
    {
        double highTemp = 0;
        for (int index = 0; index <= 12; index++)
        {
            if (getInfo->highestTemperature > highTemp)
                highTemp = getInfo->highestTemperature;
        }
            //return highTemp to function
        cout << " The maximum temperature is : " << highTemp << endl;
        return highTemp;
    }

Answer 1

首先，你的getInfo方法并没有记录所有12个月的数据：它会一直覆盖它们。

因此，您需要更改您的西雅图变量，以便它可以保存所有12个月的数据，如下所示：

WeatherData seattle[12];
...

GetInfo(&seattle);
....

void GetInfo(WeatherData* theData){
...
for (int index = JANUARY; index <= DECEMBER; index++)
        {
            cout << "Enter the total rainfall in month " << (index+1) << " (greater than or equal to zero) : " << endl;
            cin >> theData[index].rainfall;

(etc)

修复getHot：

double getHot(WeatherData * getInfo)
{
    double highTemp = 0;
    double highIndex = -1;
    for (int index = 0; index <= 12; index++)
    {
        if (getInfo->highestTemperature > highTemp) {
            highTemp = getInfo->highestTemperature;
            highIndex = index;
        }
    }

    cout << " The maximum temperature is : " << getInfo[highIndex].highTemp << endl;
    cout << " the hottest month is: " << highIndex << endl;
    cout << " The rainfall in the hottest month is: " << getInfo[highIndex].rainfall << endl;

    return highTemp; //if you still want to return highTemp
}

难以在函数和结构之间调用信息

1 个答案: