c - 我正处于解决这个问题的边缘。看看...谁能告诉我我应该改变什么？

Question

#include <stdio.h>
int main ()
{
    char name[20];

    printf("Type your name please: ");
    fgets(name,20,stdin);

    switch(name[20])
    {
    case 'name1':
        printf("\nYou are good\n");
        break;
    case 'name2':
        printf("\nYou are not so good\n");
        break;
    case 'name3':
        printf("\nYou are bad\n");
        break;
    case 'name4':
        printf("\nYou are very ba\n");
        break;
    default:
        printf("\nYou entered an invalid letter\n");
        break;
    }
    return 0;
}

Answer 1

您不能使用switch来比较字符串。它仅适用于整数类型。另外，字符串常量用双引号 (") 表示，而不是单引号 (')。您需要使用 strcmp 来比较字符串:

if (!strcmp(name, "name1")) {
    printf("\nYou are good\n");
} else if (!strcmp(name, "name2")) {
    printf("\nYou are not so good\n");
} else if (!strcmp(name, "name3")) {
    printf("\nYou are bad\n");
} else if (!strcmp(name, "name4")) {
    printf("\nYou are very ba\n");
} else {
    printf("\nYou entered an invalid letter\n");
}