题目描述

把权数总数当10必爆 为了四舍五入就把它当作1吧～
这样可以ac 而不是像乘以权重再除以10一样无法四舍五入

C++ 代码

#include<iostream>

#include<cstdio>

using namespace std;
int main(){
    double a1,a2,a3,a4;
    cin>>a1>>a2>>a3>>a4;
    double x,y,z;
    x=(a1*0.2+a2*0.3+a3*0.4+a4*0.1);

    printf("Media: %.1lf\n",x);
    if(x>=7)
    cout<<"Aluno aprovado."<<endl;
    if(x<5)
    cout<<"Aluno reprovado."<<endl;

    if(x>=5&&x<7)
    {
    cout<<"Aluno em exame."<<endl;
    cin>>y;
    printf("Nota do exame: %.1lf\n",y);
    z=(x+y)/2;
    if(z>=5)
    cout<<"Aluno aprovado."<<endl;
    else
    cout<<"Aluno reprovado."<<endl;
    printf("Media final: %.1lf",z);
    }

    return 0;
}