字符作为数字打印到 std::cout

Posted 2023-02-21

【中文标题】字符作为数字打印到 std::cout

【英文标题】：Character printing out as numbers to std::cout

【发布时间】：2012-03-06 11:14:35

【问题描述】：

我不明白我的问题。我的清单上的派系价值观和数量似乎是正确的。但是，我的输出有问题。只给我数字，不给我字母来显示他们属于哪个派系。

打印数字的语句在底部，如下所示：

cout << "Your first Card is "
     << numberBoxListHead_ptr->getNumber()
     << factionHead_ptr->getLetter()
     << endl;

这里是完整的代码：

#include <iostream>
#include <conio.h>
using namespace std;

//The Class where the List depends on it.
class NumberBox

private:

    int number;
    char letter;

public:

    NumberBox *next_ptr;
    void setNumber(int number)
    
        this->number = number;
    

    void setLetter(char letter)
    
        this->letter = letter;
    


    int getNumber()
    
        return number;
    

    char getLetter()
    
        return letter;
    
;

int main()

    int number[4];
    char faction[4];

    NumberBox *factionHead_ptr = new NumberBox();
    NumberBox *factionBody1_ptr = new NumberBox();
    NumberBox *factionBody2_ptr = new NumberBox();
    NumberBox *factionBody3_ptr = new NumberBox();
    NumberBox *factionTail_ptr = new NumberBox();

    NumberBox *numberBoxListHead_ptr = new NumberBox();
    NumberBox *numberBoxListBody1_ptr = new NumberBox();
    NumberBox *numberBoxListBody2_ptr = new NumberBox();
    NumberBox *numberBoxListBody3_ptr = new NumberBox();
    NumberBox *numberBoxListTail_ptr = new NumberBox();

    cout << "Please give the number for the first Card" << endl;
    cin >> number[0];
    if(number[0] > 0 && number[0] < 13)
    
        numberBoxListHead_ptr->setNumber(number[0]); /* <--- Setting for the first input, which is the number */
    
    else
    
        cout << " Invalid " << endl;
        exit(1);
    
    cout << "Please Give the faction for the first Card" << endl;
    cin >> faction[0];
    if(faction [0] == 's' || faction [0] == 'c' || faction [0] == 'h' || faction [0] == 'd')
    
        if(faction[0] == 's')
        
            factionHead_ptr->setLetter('s');
        
        else if(faction[0] == 'c')
        
            factionHead_ptr->setLetter('c');
        
        else if(faction[0] == 'h')
        
            factionHead_ptr->setLetter('h');
        
        else if(faction[0] == 'd')
        
            factionHead_ptr->setLetter('d');
        
    
    else
    
        cout << "Invalid" << endl;
        exit(1);
    


    cout << "Please give the number for the Second Card" << endl;
    cin >> number[1];
    if(number[1] > 0 && number[1] < 13)
    
        numberBoxListBody1_ptr->setNumber(number[1]); /* <--- Setting for the second input, which is the number */
    
    else
    
        cout << " Invalid " << endl;
        exit(1);
    
    cout << "Please Give the faction for the second Card" << endl;
    cin >> faction[1];
    if(faction[1] == 's' || faction[1] == 'c' || faction [1] == 'h' || faction [1] == 'd')
    
        if(faction[1] == 's')
        
            factionHead_ptr->setLetter('s');
        
        else if(faction[1] == 'c')
        
            factionHead_ptr->setLetter('c');
        
        else if(faction[1] == 'h')
        
            factionHead_ptr->setLetter('h');
        
        else if(faction[1] == 'd')
        
            factionHead_ptr->setLetter('d');
        
    
    else
    
        cout << "Invalid" << endl;
        exit(1);
    
    cout << "Please give the number for the Third Card" << endl;
    cin >> number[2];
    if(number[2] > 0 && number[2] < 13)
    
        numberBoxListBody2_ptr->setNumber(number[2]); /* <--- Setting for the third input, which is the number */
    
    else
    
        cout << " Invalid " << endl;
        exit(1);
    
    cout << "Please Give the faction for the Third Card" << endl;
    cin >> faction[2];
    if(faction[2] == 's' || faction[2] == 'c' || faction [2] == 'h' || faction [2] == 'd')
    
        if(faction[2] == 's')
        
            factionHead_ptr->setLetter('s');
        
        else if(faction[2] == 'c')
        
            factionHead_ptr->setLetter('c');
        
        else if(faction[2] == 'h')
        
            factionHead_ptr->setLetter('h');
        
        else if(faction[2] == 'd')
        
            factionHead_ptr->setLetter('d');
        
    
    else
    
        cout << "Invalid" << endl;
        exit(1);
    
    cout << "Please give the number for the fourth Card" << endl;
    cin >> number[3];
    if(number[3] > 0 && number[3] < 13)
    
        numberBoxListBody3_ptr->setNumber(number[3]); /* <--- Setting for the fourth input, which is the number */
    
    else
    
        cout << " Invalid " << endl;
        exit(1);
    
    cout << "Please Give the faction for the fourth Card" << endl;
    cin >> faction[3];
    if(faction[3] == 's' || faction[3] == 'c' || faction [3] == 'h' || faction [3] == 'd')
    
        if(faction[3] == 's')
        
            factionHead_ptr->setLetter('s');
        
        else if(faction[3] == 'c')
        
            factionHead_ptr->setLetter('c');
        
        else if(faction[3] == 'h')
        
            factionHead_ptr->setLetter('h');
        
        else if(faction[3] == 'd')
        
            factionHead_ptr->setLetter('d');
        
    
    else
    
        cout << "Invalid" << endl;
        exit(1);
    
    cout << "Please give the number for the Fifth Card" << endl;
    cin >> number[4];
    if(number[4] > 0 && number[4] < 13)
    
        numberBoxListTail_ptr->setNumber(number[4]); /* <--- Setting for the fifth input, which is the number */
    
    else
    
        cout << " Invalid " << endl;
        exit(1);
    

    cout << "Please Give the faction for the fifth Card" << endl;
    cin >> faction[4];
    if(faction[4] == 's' || faction[4] == 'c' || faction [4] == 'h' || faction [4] == 'd')
    
        if(faction[4] == 's')
        
            factionHead_ptr->setLetter('s');
        
        else if(faction[4] == 'c')
        
            factionHead_ptr->setLetter('c');
        
        else if(faction[4] == 'h')
        
            factionHead_ptr->setLetter('h');
        
        else if(faction[4] == 'd')
        
            factionHead_ptr->setLetter('d');
        
    
    else
    
        cout << "Invalid" << endl;
        exit(1);
    

    //This would be the list for the value of the card.

    numberBoxListHead_ptr->next_ptr = numberBoxListBody1_ptr; /* <--- From Head to Body1 */
    numberBoxListBody1_ptr->next_ptr = numberBoxListBody2_ptr; /* <--- From Body1 to Body2 */
    numberBoxListBody2_ptr->next_ptr = numberBoxListBody3_ptr; /* <--- From Body2 to Body3 */
    numberBoxListBody3_ptr->next_ptr = numberBoxListTail_ptr; /* <--- From Body3 to BodyTail */

    //This Would be the list for the faction of the card.

    factionHead_ptr->next_ptr = factionBody1_ptr; /* <--- From Head to Body1 */
    factionBody1_ptr->next_ptr = factionBody2_ptr; /* <--- From Body1 to Body2 */
    factionBody2_ptr->next_ptr = factionBody3_ptr; /* <--- From Body2 to Body3 */
    factionBody3_ptr->next_ptr = factionTail_ptr; /* <--- From Body3 to BodyTail */

    int counter;
    for(counter = 0; counter < 4; counter++)
    
        if(counter == 0)
        
            cout << "Your first Card is " << numberBoxListHead_ptr->getNumber() << factionHead_ptr->getLetter() << endl;
        
        if(counter == 1)
        
            cout << "Your Second Card is " << numberBoxListBody1_ptr->getNumber() << factionBody1_ptr->getLetter() << endl;
        
        if(counter == 2)
        
            cout << "Your third Card is " << numberBoxListBody2_ptr->getNumber() << factionBody2_ptr->getLetter() << endl;
        
        if(counter == 3)
        
            cout << "Your fourth Card is " << numberBoxListBody3_ptr->getNumber() << factionBody3_ptr->getLetter() << endl;
        
        if(counter == 4)
        
            cout << "Your fifth Card is " << numberBoxListTail_ptr->getNumber() << factionTail_ptr->getLetter() << endl;
        
    
    getch();

【参考方案1】：

int getLetter()

在这种情况下这是错误的。 letter 是一个字符，如果您希望将其打印为字母，请确保返回一个字符。

char getLetter()  ... 

如果你返回一个int，std::cout 将打印它的数值，就像它为卡片等级所做的那样。如果你返回一个char，它将打印相应的字符，而不是它的数值。

（您的代码需要进行认真的重构工作。创建函数来处理输入花色和等级，并重用这些函数。然后弄清楚如何循环读取四张牌。）

【讨论】：

最后一件事。直到第五张卡片的第二张没有显示字母。

你需要自己调试，代码很难理解，因为它重复了很多次，你有一些东西的数组和其他东西的命名变量。所以你需要自己解决这个问题。但是只需查看您的代码，并检查您是否曾经为 factionBodyX_ptr 变量设置等级或西装。

我怎么觉得自己这么愚蠢。在我所有的派系中，都是“factionHead_ptr->setLetter”，非常感谢！垫子！