4.14打卡

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
    int n;
    cout<<"你考试考了多少分？（0-100）";
    cin>>n; 
    if(n>=90&&n<=100)
    cout<<"优";
    if(n>=80&&n<90)
    cout<<"良";
    if(n>=60&&n<80)
    cout<<"中";
    if(n>=0&&n<60)
    cout<<"差";
    return 0;
}