ac 棨戟 · 发布于 2026-08-05 · 浏览 105 回复 0 include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n<=100&&n>=90){cout<<"A";} if(n<=89&&n>=80){cout<<"B";} if(n<=79&&n>=70){cout<<"C";} if(n<=69&&n>=60){cout<<"D";} if(n<=59&&n>=0){cout<<"E";} return 0; }