client.c:996: error: a label can only be part of a statement and a declaration is not a statement

switch(a){
  case 1: .................... .................... .................... break; case 2: break; } 　 在GCC下编译会出现如下错误： error: a label can only be part of a statement and a declaration is not a statement 但加上如下括号后，就没有错误了，这是为什么？编译器的问题？ switch(a){
  case 1: ｛ .................... .................... .................... ｝ break; case 2: break; } http://zhidao.baidu.com/link?url=fSrpX7VaVXd5-L8c2zj2xVDSbh8bM-5xyO6iyZOYgV30mI_iZlASQmNakmGSC-4gnPO3oG2HzIAvdSVayOTjTa http://www.cnblogs.com/radiolover/p/4307453.html 手机定位 http://www.cnblogs.com/skyme/p/4310550.html 数据挖掘