今天编程用switch发现一个问题，算了，先贴源程序再说问题吧。
1 #include <stdio.h>
2 int main(int argc, char * argv[])
3 {
4 int t = 0;
5 switch ( t )
6 {
7 case -1 :
8 printf ( "test\n" );
9 case 0:
10 printf ( "the postgresql server has been started by myself\n" );
11 default:
12 printf ( "the postgresql server can not be started ,please install it firse\n" );
13 exit ( 0 );
14 }
15
16 }
17 编译运行，其输出结果如下：
the postgresql server has been started by myself
the postgresql server can not be started ,please install it firse
但是，大家知道我想要的不是这个结果，不是这个结果啊
那问题出在哪儿呢？我找了半天，似乎解决了，更改后的源程序如下
1 #include <stdio.h>
2 int main(int argc, char * argv[])
3 {
4 int t = 0;
5 switch ( t )
6 {
7 case -1 :
8 printf ( "test\n" );break;
9 case 0:
10 printf ( "the postgresql server has been started by myself\n" );break;
11 default:
12 printf ( "the postgresql server can not be started ,please install it firse\n" );
13 exit ( 0 );
14 }
15
16 }
17 更改后编译运行结果如下
the postgresql server has been started by myself
嗯，这才是我要的结果
那两段源程序的区别在哪儿呢？
在于我加了break。