4.15打卡

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    char A,D,S,Q,ch;
    while(ch!='Q')
    {
    cout<<"Menu：A(dd) D(elete) S(ort) Q(uit)，Select One：";
    cin>>ch;
    if(ch=='A')
    cout<<"数据已经增加\n";
    else if(ch=='D')
    cout<<"数据已经删除\n"; 
    else if(ch=='S')
    cout<<"数据已经排序\n";
    }
    return 0;
}