PTA乙级（1077 互评成绩计算 (20分),(C++取整)

C++取整

头文件：#include <cmath>

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    double a=2.5;
    cout<<ceil(a)<<endl;   //向上取整
    cout<<floor(a)<<endl;   //向下取整
    cout<<round(a)<<endl;   //四舍五入
    //不使用函数实现
    //向下取整
    cout<<(int)a<<endl;
    //向上取整
    cout<<(a>(int)a?(int)a+1:(int)a)<<endl;
    //四舍五入
    cout<<(int)(a+0.5)<<endl;
    return 0;
}

1077 互评成绩计算 (20分)

https://pintia.cn/problem-sets/994805260223102976/problems/994805262303477760

#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <vector>
#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
    int n,m,temp;
    int g1,g2;
    int max,min;
    int i,j,k;
    cin>>n>>m;
    for(i=0;i<n;i++)
    {
        cin>>g2;
        vector<int> v;
        int sum=0;
        for(j=0;j<n-1;j++)
        {
            cin>>temp;
            if(temp>=0&&temp<=m) v.push_back(temp);
        }
        sort(v.begin(),v.end());
        for(j=1;j<v.size()-1;j++) sum+=v[j];

        cout<<(int)((sum*1.0/(v.size()-2)+g2)/2+0.5)<<endl;
    }
    return 0;