work

• switch

#include
    
     using namespace std;int main(){    int i;    cout<<"please enter one member 1 to 7..."<
     
      >i;        if(i<1||i>7)        {            cout<<"input error,out of range...please input again..."<
      
       7);    switch(i)        {            case 1:            case 2:            case 3:            case 4:            case 5:                cout<<"workday,let's work hard\n"<
      
     
    

• while

#include
    
     using namespace std;int main(){    int i;    int answer=0;     cout<<"please input a number "<
     
      >i;    while(i!=0)    {        answer*=10;        answer+=i%10;        i/=10;    }        cout<<"answer is "<
      
       <