Question

首先，我是编程新手。我遇到的问题是，我无法覆盖此char，因为IDE告诉我，即使我没有将其声明为1，它也是一个常量。第二个问题是，它不会打印出用户名（我用注释标记了这些行），错误消息告诉我这也与常量char有关。编辑：关于2.问题，我刚刚意识到，我使用％d而不是％c，但是一旦我更改了它，那只会使情况变得更糟

这是“ PersonenDrinks.h”：

struct Person {
    int Armbrust;
    int Leistung;
    int Kamikaze;
    int Fraktion;
    int Spiral;
    int Zyklop;
    int Glueklich;
    int Waesche;
    int Bildhauer;
    int Neuheit;
    int Matze;
    int Kaenguru;
    int Parfuem;
    int Tasche;
    int Montieren;
    char Name [25];
};

这是主要代码：

#include <math.h>
#include <iostream>
#include <string>
#include <time.h>
#include "PersonenDrinks.h"

int main()
{
    struct Person User1;
    struct Person User2;
    struct Person User3;
    struct Person User4;
    struct Person User5;
    struct Person User6;
    struct Person User7;
    struct Person User8;
    struct Person User9;
    struct Person User10;
    struct Person User11;
    struct Person User12;
    struct Person User13;
    struct Person User14;
    struct Person User15;
    struct Person User16;

    User1.Name= "Kevin";
    User2.Name = "Stephie";
    User3.Name = "Erich";
    User4.Name = "TomLaurin";
    User5.Name = 
    User6.Name =
    User7.Name =
    User8.Name =
    User9.Name =
    User10.Name =
    User11.Name =
    User12.Name = 
    User13.Name == NULL;
    User14.Name == NULL;
    User15.Name == NULL;
    User16.Name == NULL;


    for (; ; )
    {

        int Person;
        int Getraenk;
        char AddUser;

        printf_s("Add User? = y/n \n");
        scanf_s(" %c",&AddUser);
        if (AddUser == 'y')
        {
            system("cls");
            printf_s("Bitte geben sie ihren Vornamen ein: \n");
            if (User13.Name == NULL)
            {
                scanf_s(" %c", &User13.Name);
                if (User13.Name != NULL)
                {
                    if (User14.Name == NULL)
                    {
                        scanf_s(" %c", &User14.Name);
                        if (User14.Name != NULL)
                        {
                            if (User15.Name == NULL)
                            {
                                scanf_s(" %c", &User15.Name);
                                if (User15.Name != NULL)
                                {
                                    if (User16.Name == NULL)
                                        scanf_s(" %c", &User16.Name);
                                }
                            }
                        }
                    }
                }
            }





        }
        else
        {
            printf_s("Bist du sicher, dass du dich nicht vertippt hast? Hattest du villeicht schon ein paar Drinks zu viel?");
        }

        printf_s(User1.Name ,"%d = 1 \n");   //here is the 2. 
        printf_s(User2.Name ,"%d  = 2 \n"); //problem
        printf_s(User3.Name ,"%d = 3 \n"); //and here
        printf_s(User13.Name ,"%d = 13 \n"); //and here

        scanf_s("%d", &Person);

        switch (Person)
        {
        case 1:
            system("cls");
            std::cout << "Was darf's sein? \n";
            std::cout << "Armbrust  = 1 \n";
            std::cout << "Leistung  = 2 \n";
            std::cout << "Kamikaze  = 3 \n";
            std::cout << "Fraktion  = 4 \n";
            std::cout << "Spiral        = 5 \n";
            std::cout << "Zyklop        = 6 \n";
            std::cout << "Gluecklich    = 7 \n";
            std::cout << "Waesche       = 8 \n";
            std::cout << "Bildhauer = 9 \n";
            std::cout << "Neuheit       = 10 \n";
            std::cout << "Matze     = 11 \n";
            std::cout << "Kaenguru  = 12 \n";
            std::cout << "Parfuem       = 13 \n";
            std::cout << "Tasche        = 14 \n";
            std::cout << "Montieren = 15 \n";
            scanf_s("%d", &Getraenk);
            system("cls");
            switch (Getraenk)
            {
            case 1:
                User1.Armbrust++;
                std::cout << "Das ist deine " << User1.Armbrust << ". Armbrust \n";
                system("pause");
                system("cls");
                break;
            case 2:
                User1.Leistung++;
                std::cout << "Das ist deine " << User1.Leistung << ". Leistung \n";
                system("pause");
                system("cls");
                break;
            case 3:
                User1.Kamikaze++;
                std::cout << "Das ist deine " << User1.Kamikaze << ". Kamikaze \n";
                system("pause");
                system("cls");
                break;
            case 4:
                User1.Fraktion++;
                std::cout << "Das ist deine " << User1.Fraktion << ". Fraktion \n";
                system("pause");
                system("cls");
                break;
            case 5:
                User1.Spiral++;
                std::cout << "Das ist deine " << User1.Spiral << ". Spiral \n";
                system("pause");
                system("cls");
                break;
            case 6:
                User1.Zyklop++;
                std::cout << "Das ist dein " << User1.Zyklop << ". Zyklop \n";
                system("pause");
                system("cls");
                break;
            case 7:
                User1.Glueklich++;
                std::cout << "Das ist deine " << User1.Glueklich << ". Glueklich \n";
                system("pause");
                system("cls");
                break;
            case 8:
                User1.Waesche++;
                std::cout << "Das ist deine " << User1.Waesche << ". Waesche \n";
                system("pause");
                system("cls");
                break;
            case 9:
                User1.Bildhauer++;
                std::cout << "Das ist deine " << User1.Bildhauer << ". Bildhauer \n";
                system("pause");
                system("cls");
                break;
            case 10:
                User1.Neuheit++;
                std::cout << "Das ist deine " << User1.Neuheit << ". Neuehieit \n";
                system("pause");
                system("cls");
                break;
            case 11:
                User1.Matze++;
                std::cout << "Das ist deine " << User1.Matze << ". Matze \n";
                system("pause");
                system("cls");
                break;
            case 12:
                User1.Kaenguru++;
                std::cout << "Das ist deine " << User1.Kaenguru << ". kaenguru \n";
                system("pause");
                system("cls");
                break;
            case 13:
                User1.Parfuem++;
                std::cout << "Das ist deine " << User1.Parfuem << ". Parfuem \n";
                system("pause");
                system("cls");
                break;
            case 14:
                User1.Tasche++;
                std::cout << "Das ist deine " << User1.Tasche << ". Tasche \n";
                system("pause");
                system("cls");
                break;
            case 15:
                User1.Montieren++;
                std::cout << "Das ist deine " << User1.Montieren << ". Montieren \n";
                system("pause");
                system("cls");
                break;
            break;
            }
            break;
        }
    }
}

Answer 1

struct Person User1;
strcpy(User1.Name, "Kevin");
printf("%s", User1.Name);

必须工作。

当您声明char someString[50]时，someString是指向组成字符串的一组字符的指针，更精确地指向第一个字符。因此，您不能只做someString = "Kevin"，而必须将“凯文”的每个字符复制到someString中。 strcpy是为您执行的功能。

我总是可以做类似的事情：

User1.name[0] = 'K';
User1.name[1] = 'e';
User1.name[2] = 'v';
User1.name[3] = 'i';
User1.name[4] = 'n';
User1.name[5] = '\0'

这是艰苦的工作。可以通过strcpy完成。 '\0'定义字符串的结尾。

Answer 2

将User1.Name= "Kevin";替换为strcpy(User1.Name, "Kevin")应该可以。

User13.Name已经是一个地址，因此scanf_s(" %s", &User13.Name);应该是scanf_s(" %24s", User13.Name, sizeof(User13.Name));

字符串的格式说明符也是%s而不是%c。

为什么这是一个常量字符，而不是普通字符？

2 个答案: