c - Switch 语句始终包含 case 和 default

Question

当我编译这个程序时，它会输出相应的 switch case 和默认标签内容，唯一不打印的值是一月，任何帮助都会很棒!

示例输入:4

示例输出:

四月错误

虽然我可以让程序变得更好，但我需要以这种特定的方式来实现它。

while (month != EOF)
{
        switch (month)
        {

            case 49:
            month2 = getchar();

            switch (month2)
            {
                case 10:
                    printf("January \n");
                    break;
                case 48:
                    printf("October \n");
                    break;
                case 49:
                    printf("November \n");
                    break;
                case 50:
                    printf("December \n");
                    break;
            }
            break;

                case 50:
                    printf("February \n");
                    break;
                case 51:
                    printf("March \n");
                    break;
                case 52:
                    printf("April \n");
                    break;
                case 53:
                    printf("May \n");
                    break;
                case 54:
                    printf("June \n");
                    break;
                case 55:
                    printf("July \n");
                    break;
                case 56:
                    printf("August \n");
                    break;
                case 57:
                    printf("Septembe \n");
                    break;
                default: printf("Error \n");





            }
            month = getchar();
}


system("PAUSE");
return (0);

}

Answer 1

您只需要一个额外的情况来处理您在终端上按 Enter 键时出现的杂散“\n”。如果您只需输入 1，一月就可以了

编辑:实际上我刚刚在 Linux 上测试了它，它运行完美，但在 Windows 上可能存在一些细微的差异。

while (month != EOF)
{
        switch (month)
        {

            case 49:
            month2 = getchar();

            switch (month2)
            {
                case 10:
                    printf("January \n");
                    break;
                case 48:
                    printf("October \n");
                    break;
                case 49:
                    printf("November \n");
                    break;
                case 50:
                    printf("December \n");
                    break;
            }
            break;

                case 50:
                    printf("February \n");
                    break;
                case 51:
                    printf("March \n");
                    break;
                case 52:
                    printf("April \n");
                    break;
                case 53:
                    printf("May \n");
                    break;
                case 54:
                    printf("June \n");
                    break;
                case 55:
                    printf("July \n");
                    break;
                case 56:
                    printf("August \n");
                    break;
                case 57:
                    printf("Septembe \n");
                    break;
                // Filter out stray \n
                case '\n':
                    break;
                default: printf("Error \n");





            }
            month = getchar();
}


system("PAUSE");
return (0);