#include<stdio.h>
void main()
{
    int x;
    for (x=5;x<12;x+=2){
        switch(x-1){
        case 4:printf("%d\n",x);
        case 7:printf("%d\n",2*x+1);
        case 10:printf("%d\n",3*x-1);break;
        default:printf("default\n");
    }
}

--------------------Configuration: aaa11 - Win32 Debug--------------------
Compiling...
aaa11.cpp
D:\c语言练习上机练习\第20章\第20章\aaa\aaa11.cpp(13) : fatal error C1004: unexpected end of file found
执行 cl.exe 时出错.

aaa11.obj - 1 error(s), 0 warning(s)

请有经验的来谈谈

#include<stdio.h>
void main()
{
    int x;
    for (x=5;x<12;x+=2)
    {
        switch(x-1)
        {
        case 4:printf("%d\n",x);
        case 7:printf("%d\n",2*x+1);
        case 10:printf("%d\n",3*x-1);break;
        default:printf("default\n");
        }
    }
}
少个 {

是少个 }

LS的回答很正确

写程序规范点就不容易出现这种情况了

如果不仔细看还真没看出来········

fatal error C1004: unexpected end of file found