求平均值，求平均值，求平均值

.现抽取我校附属中学六年级20名学生的期末总成绩，输出后，求高于平均值的学生成绩.(数据类型按照实际情况定义)

输入20个成绩，再求高于平均值的学生成绩

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/* Note:Your choice is C IDE */
#include "stdio.h"
void main()
{
    int a[20],i;
    float avg=0,sum=0;
    
    for(i=0;i<20;i++){
    	printf("请输入%d号学生成绩：",i+1);
    	scanf("%d",&a[i]);
    	sum+=a[i];
    }
    avg=sum/20.0;
    printf("平均成绩为%.2f\n",avg);
    printf("高于平均成绩的分数有：\n");
     for(i=0;i<20;i++){
    	if(a[i]>avg){
    		printf("%3d",a[i]);
    	}
    }
}

#include <stdio.h>
void main()
{
    int i, arr[20];
    int sum = 0;
    int count = 0;
    double avg = 0;
    for (i = 0; i <20;++i)
    {
        scanf("%d", &arr[i]);
        sum += arr[i];
    }
    avg = sum / 20.0;
    for (i = 0; i <20;++i)
    {
        if (arr[i] > avg)
        {
            count++;
             printf("高于平均分成绩:%d\n", arr[i]);
        }
    }
    printf("平均分：%lf\n", avg);
    printf("人数：%d\n", count);
}

 我所理解题目的意思，写出的代码是这样的：

#include <iostream>
#include <stdio.h>
#include <string>
#include <vector>

using namespace std;


typedef struct student {
	string name;		// 姓名
	float chinese;		// 语文成绩
	float math;			// 数学成绩
	float english;		// 英语成绩
	float total;		// 总成绩
};


int main(void) {
	// 定义学生容器
	vector<student> studentInfo;

	// 定义数据
	struct student stu1;
	stu1.name = "小明";
	stu1.chinese = 88.8;
	stu1.math = 77.7;
	stu1.english = 66.6;
	stu1.total = (stu1.chinese + stu1.math + stu1.english) / 3;

	struct student stu2;
	stu2.name = "小红";
	stu2.chinese = 82.8;
	stu2.math = 74.7;
	stu2.english = 68.6;
	stu2.total = (stu2.chinese + stu2.math + stu2.english) / 3;

	struct student stu3;
	stu3.name = "小蓝";
	stu3.chinese = 68.8;
	stu3.math = 87.7;
	stu3.english = 96.6;
	stu3.total = (stu3.chinese + stu3.math + stu3.english) / 3;

	struct student stu4;
	stu4.name = "小紫";
	stu4.chinese = 67.8;
	stu4.math = 89.7;
	stu4.english = 98.6;
	stu4.total = (stu4.chinese + stu4.math + stu4.english) / 3;

	struct student stu5;
	stu5.name = "小黄";
	stu5.chinese = 88.5;
	stu5.math = 87.5;
	stu5.english = 90.0;
	stu5.total = (stu5.chinese + stu5.math + stu5.english) / 3;

	// 结构体数据存储到容器中
	studentInfo.push_back(stu1);
	studentInfo.push_back(stu2);
	studentInfo.push_back(stu3);
	studentInfo.push_back(stu4);
	studentInfo.push_back(stu5);


	// 计算总平均分
	double avg = 0.0;
	for (int i = 0; i < studentInfo.size(); i++) {
		avg += studentInfo.at(i).total;
		cout << "name：" << studentInfo.at(i).name << "\t总成绩：" << studentInfo.at(i).total << endl;
	}

	// 计算他们平均分的平均分
	avg /= studentInfo.size();
	cout << "平均总分：" << avg << endl;

	// 输出高于总平均分的学生成绩
	cout << endl << "平均分高于总成绩的学生：" << endl;
	for (int i = 0; i < studentInfo.size(); i++) {
		if (studentInfo.at(i).total > avg) {
			cout << "name：" << studentInfo.at(i).name << "\t总成绩：" << studentInfo.at(i).total << endl;
		}

	}

	return 0;
}

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