开关盒未打印c

用C中的另一个问题再次返回。 我的switch语句有一些问题。我的程序正在编译和运行，甚至将正确的值存储在正确的变量中，并按应有的方式运行switch语句，但打印特定输出时除外。请记住，我正在努力学习，我的知识非常基础。我非常感谢你们在这个迷人的社区中所给予的帮助，我希望你们的回答能帮助我了解更多

不费吹灰之力，这里出现了一堵编码文本的墙

// Point of sale software that lists a set of packages with a subset of possible upgrades for each
/*This C program was written with a zoom value of 100 and with the use of wordwrap
the native resolution of the screen is set to 1920x1080
for easiest veiwing make sure wordwrap is up*/
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
    int  package = 0, memory = 0, hd = 0, monitor = 0, gpu = 0, another = 0;
    float  price = 0, memprice = 0, hdprice = 0, monprice = 0, gpuprice = 0, subtotal = 0, hst = 0, total = 0;
    printf("Welcome to the IPC Company's Computer System Calculator\nthe package desired\n(1: basic, 2 : professional, 3 : game system) : ");
    scanf("%d", &package);
    do // the condition to break the loop is to have the user input 0 into the variable another
    {
        if (package == 1) //selects the basic package and stores user selections of upgrades
        {
            price = 599;
            printf("Enter additional memory required\n(0: 4 GB included, 1 : 8 GB, 2 : 12 GB) : ");
            scanf("%d", &memory);
            printf("Enter monitor required\n(0: 21 inch LED included, 1 : 27 inch LED) : ");
            scanf("%d", &monitor);
            printf("Enter Hard Drive drive required\n(0: 512 GB included, 1 : 128 GB SSD) : ");
            scanf("%d", &hd);
            printf("\n\n========================================\n");
            printf("Basic Package                     599.00\n");
        }
        else if (package == 2)// selects the professional package and stores user selections of upgrades
        {
            price = 899;
            printf("Enter additional memory required\n(0: 8 GB included, 1 : 16 GB) : ");
            scanf("%d", &memory);
            memory += 3;
            printf("Enter monitor required\n(0: 27 inch LED included, 1 : 32 inch LED) : ");
            scanf("%d", &monitor);
            monitor += 2;
            printf("Enter Hard Drive drive required\n(0: 1 TB included, 1 : 256 GB SSD, 2 : 512 GB SSD) : ");
            scanf("%d", &hd);
            hd += 2;
            printf("Enter Video Card required\n(0: IGP included, 1 : 2 GB Discrete) : ");
            scanf("%d", &gpu);
            gpu += 1;
            printf("\n\n========================================\n");
            printf("Professional Package              899.00\n");
        }
        else
        {
            price = 1499; //selects the gaming package and stores user selections for upgrades
            printf("Enter additional memory required\n(0: 16 GB included, 1 : 32 GB) : ");
            scanf("%d", &memory);
            memory += 5;
            printf("Enter monitor required\n(0: 32 inch LED included, 1 : 28 inch 4K HD) : ");
            scanf("%d", &monitor);
            monitor += 4;
            printf("Enter Hard Drive drive required\n(0: 256 GB SSD included, 1 : 512 GB SSD, 2 : 1 TB SSD) : ");
            scanf("%d", &hd);
            hd += 5;
            printf("Enter Video Card required\n(0: 2 GB Discrete included, 1 : 4 GB Discrete) : ");
            scanf("%d", &gpu);
            gpu += 3;
            printf("\n\n========================================\n");
            printf("Gaming Package                   1499.00\n");
            //values for each variable is upcast by an appropriate amount to keep input either 0 1 2 while storing them as 0 to 8+ to allow 
            //the use of four switches as apposed to a switch for each individual package/component combination
            //partial credit to professor joseph hughes for shedding light on this methodology
        }
        switch (memory)//4 switch catagories based on memory hd gpu and monitor each containing a pre defined price
        {
        case 0:
            memprice = 0;
            printf("4 GB Memory:                        0.00\n");
            break;
        case 1:
            memprice = 99;
            printf("8 GB Memory:                       99.00\n");
            break;
        case 2:
            memprice = 189;
            printf("12 GB Memory:                     189.00\n");
            break;
        case 3:
            memprice = 0;
            printf("8 GB Memory:                        0.00\n");
            break;
        case 4:
            memprice = 189;
            printf("16 GB Memory:                     189.00\n");
            break;
        case 5:
            memprice = 0;
            printf("16 GB Memory:                       0.00\n");
            break;
        case 6:
            memprice = 389;
            printf("32 GB Memory:                     389.00\n");
            break;
        }
        switch (monitor)
        {
        case 0:
            monprice = 0;
            printf("21 inch LED Monitor                 0.00\n");
            break;
        case 1:
            monprice = 199;
            printf("27 inch LED Monitor               199.00\n");
            break;
        case 2:
            monprice = 0;
            printf("27 inch LED Monitor                 0.00\n");
            break;
        case 3:
            monprice = 199;
            printf("32 inch LED Monitor               199.00\n");
            break;
        case 4:
            monprice = 0;
            printf("32 inch LED Monitor                 0.00\n");
            break;
        case 5:
            monprice = 299;
            printf("28 inch 4K LED Monitor            299.99\n");
            break;
        }
        switch (hd)
        {
        case 0:
            hdprice = 0; printf("512 GB Hard Drive                   0.00\n");
            break;
        case 1:
            hdprice = 119;
            printf("128 GB SSD                        119.00\n");
            break;
        case 2:
            hdprice = 0;
            printf("1 TB Hard Drive                     0.00\n");
            break;
        case 3:
            hdprice = 189;
            printf("256 GB SSD                        189.00\n");
            break;
        case 4:
            hdprice = 399;
            printf("512 GB SSD                        399.99\n");
            break;
        case 5:
            hdprice = 0;
            printf("256 GB                              0.00\n");
            break;
        case 6:
            hdprice = 299;
            printf("512 GB SSD                        299.00\n");
            break;
        case 7:
            hdprice = 599;
            printf("1TB SSD                           599.00\n");
            break;
        }
        switch (gpu)
        {
        case 0:
            gpuprice = 0;
            break;
        case 1:
            gpuprice = 0;
            printf("IGP Video                           0.00\n");
            break;
        case 2:
            gpuprice = 209;
            printf("Discrete 2GB Video                209.00\n");
            break;
        case 3:
            gpuprice = 0;
            printf("Discrete 2GB Video                  0.00\n");
            break;
        case 4:
            gpuprice = 399;
            printf("Discrete 4GB Video                399.00\n");
            break;
        }

        subtotal = price + memprice + monprice + gpuprice + hdprice;
        hst = subtotal*.13;
        total = subtotal + subtotal*.13;

        printf("========================================\n");
        printf("Sub Total:                       %.2f\n", subtotal);
        printf("HST:                              %.2f\n", hst);
        printf("========================================\n");
        printf("Total:                           %.2f\n", total);

        printf("Do you wish to choose another computer package? (1: YES or 0: NO): ");
        scanf("%d", &another);
        // note most prices are registerd as string literals and not variable calls with the exclusion of subtotal hst and total
    } while (another == 1);


    return 0;



}

变量memory、hd、monitor等声明为整数，但switch语句使用的是char类型。只需删除单引号

case '1': // this is a char
case 1:   // this is an integer 

---

内存和监视器以及hd和gpu包含int值，而不是您的case语句正在测试的“char”值。此外，一些scanf调用看起来可疑：scanf%d，hd；应为扫描%d，&hd；后者将读取的整数存储到hd中；前者将其写入某个垃圾地址，该地址是从hd碰巧包含的任何值派生的！我的意思是，如果你把一个值1输入一个整数，你的case语句应该测试值1，而不是字符“1”。你看到区别了吗？通过对“1”进行测试，编译器会将其视为对值49的测试，该值是数值字符“1”的ASCII值@FadyAlkarmi:如果启用了警告，编译后的程序将/应该对scanf问题发出警告。我强烈建议在GCC中使用-Wall，如果使用其他编译器，请查看编译器手册。在switch语句中，最好始终包含“default:”大小写，尤其是在处理用户输入时，因为否则，程序如何知道输入是否有效。还建议在进入下一个输入之前测试每个输入，可能是在循环中，或者通过为每个输入调用子函数来确保输入值有效。次要的挑剔：“1”仍然具有int类型，但它可能与1的值不同。非常感谢！我的老师和他的笔记都没有提到这一点。这就是为什么我真的很感激这个社区，希望有一天我能再次回馈你，祝你度过一个美好的夜晚/一天@MartinTörnwall是的，“1”并不意味着任何数据类型，它是在使用它的上下文中表示数值的一种方式，在本例中，它是一个int。@WeatherVane see@user3629249您没有阅读Martin törnwall的链接或这些注释吗？c是字符1字节，但“x”不是。