Question

我正在尝试创建一个程序，允许用户输入由五位评委给出的分数。然而，一旦它达到第三个法官的分数，用于标记法官的增量＃停止工作，我相信它与if / else语句有关。这是我的代码：

#include <iostream>
#include <string>

using namespace std;

string name;
string city;
double highestScore;
double lowestScore;
double totalScore;

void main()
{

    cout << "   Report to the media" << endl;
    cout << "Enter the diver name: ";
    getline(cin, name);
    cout << endl;
    cout << "Enter the diver's city: ";
    getline(cin, city);
    cout << endl;

    int count = 0;
    double score1, score2, score3, score4, score5;
    int judgeNum = 0;

    judgeNum ++;
    cout << "Enter the score given by judge #" << judgeNum << ": ";
    cin >> score1;
    if (score1 < 0 || score1 > 10)
            {
                cout << endl;
                cout << "Score must be between 1 and 10. Please re-enter score: ";
                cin >> score1;
            }
    cout << endl; 
    count ++;

    while (count <= 5)
    {
        judgeNum ++;
        count ++;

        cout << "Enter the score given by judge #" << judgeNum << ": ";

        if (judgeNum = 2)
        {
            cin >> score2;
            if (score2 < 0 || score2 > 10)
            {
                cout << endl;
                cout << "Score must be between 1 and 10. Please re-enter score: ";
                cin >> score2;
            }
        }
        else 
        {
            if (judgeNum = 3)
            {
                cin >> score3;
                if (score3 < 0 || score3 > 10)
                {
                    cout << endl;
                    cout << "Score must be between 1 and 10. Please re-enter score: ";
                    cin >> score3;
                }               
            }
            else 
            {
                if (judgeNum = 4)
                {
                    cin >> score4;
                    if (score4 < 0 || score4 > 10)
                    {
                        cout << endl;
                        cout << "Score must be between 1 and 10. Please re-enter score: ";
                        cin >> score4;
                    }
                }
                else 
                {
                    if (judgeNum = 5)
                    {
                        cin >> score5;
                        if (score5 < 0 || score5 > 10)
                        {
                            cout << endl;
                            cout << "Score must be between 1 and 10. Please re-enter score: ";
                            cin >> score5;
                        }
                    }
                }
            }
        }
        cout << endl;
    }
    cout << score1 << score2 << score3 << score4 << score5;
}

Answer 1

if (judgeNum = 2)将judgeNum设置为2，然后检查judgeNum的新值是否为“truthy”（非零）。因为新值是2，所以它总是，并且在这里，judgeNum将始终设置为2，然后递增。

在C，C ++和大多数其他语言中，使用两个=来确定相等性，例如if (judgeNum == 2)。首先尝试修复它。

Answer 2

除了kdmurray91's answer

之外

纠正一个

using namespace std;

string name;
string city;
double highestScore;
double lowestScore;
double totalScore;

void main()
{

    cout << "   Report to the media" << endl;
    cout << "Enter the diver name: ";
    getline(cin, name);
    cout << endl;
    cout << "Enter the diver's city: ";
    getline(cin, city);
    cout << endl;

    int count = 0;
    double score1, score2, score3, score4, score5;
    int judgeNum = 0;

    judgeNum ++;
    cout << "Enter the score given by judge #" << judgeNum << ": ";
    cin >> score1;
    if (score1 < 0 || score1 > 10)
            {
                cout << endl;
                cout << "Score must be between 1 and 10. Please re-enter score: ";
                cin >> score1;
            }
    cout << endl; 
    count ++;

    while (count <= 5)
    {
        judgeNum ++;
        count ++;

        cout << "Enter the score given by judge #" << judgeNum << ": ";

        if (judgeNum == 2)
        {
            cin >> score2;
            if (score2 < 0 || score2 > 10)
            {
                cout << endl;
                cout << "Score must be between 1 and 10. Please re-enter score: ";
                cin >> score2;
            }
        }
        else 
        {
            if (judgeNum == 3)
            {
                cin >> score3;
                if (score3 < 0 || score3 > 10)
                {
                    cout << endl;
                    cout << "Score must be between 1 and 10. Please re-enter score: ";
                    cin >> score3;
                }               
            }
            else 
            {
                if (judgeNum == 4)
                {
                    cin >> score4;
                    if (score4 < 0 || score4 > 10)
                    {
                        cout << endl;
                        cout << "Score must be between 1 and 10. Please re-enter score: ";
                        cin >> score4;
                    }
                }
                else 
                {
                    if (judgeNum == 5)
                    {
                        cin >> score5;
                        if (score5 < 0 || score5 > 10)
                        {
                            cout << endl;
                            cout << "Score must be between 1 and 10. Please re-enter score: ";
                            cin >> score5;
                        }
                    }
                }
            }
        }
        cout << endl;
    }
    cout << score1 << score2 << score3 << score4 << score5;
}

C ++增量在If Else语句中不起作用

2 个答案: