c语言中switch语句中存在未放在case中语句_modi000的博客_switch语句没有包含case

    int mm=2;
    switch(mm){
     cout<<"hello";
    case 1:
    {

        int nn =22;
        cout<<nn;
        break;
    }
    case 2:
    {
        cout<<mm;
        break;
    }
    }
    int mm=2;
    switch(mm){
     cout<<"hello