C++习题（学生成绩统计）

C++习题

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题目

一个学习小组有6人，共有5门课程，编程实现以下要求：
(1)求第一门课程的平均成绩。
(2)找出有一门课程以上不及格的学员，输出该学员的所有成绩和平均成绩。
(3)找出5门课程都在90分以上的学员以及平均成绩在95分以上的学员。

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代码实现

#include <iostream>

using namespace std;


//定义结构体
typedef struct {
	string name;
	float coursegrade[5];
}Student;


//求第一门课程的平均成绩
void printAverageFirstCourseGrade(Student* student) {
	float sumgrade=0;
	for (int i = 0; i < 6; i++) {
		sumgrade += (student + i)->coursegrade[1];
	}
	cout<<"第一门课程的平均成绩为："<<sumgrade / 6<<endl;
}


//找出有一门课程以上不及格的学员，输出该学员的所有成绩和平均成绩
void printFlunkStudentData(Student* student) {
	for (int i = 0; i < 6; i++) {
		int signal = 0;
		for (int j = 0; j < 5; j++) {
			if ((student + i)->coursegrade[j] < 60) {
				signal = 1;
			}
			if (signal) {
				cout << (student + i)->name << endl;
				for (int k = 0; k < 5; k++) {
					cout << "第"<<k+1<<"科成绩为："<<(student + i)->coursegrade[k]<<endl;
				}
				cout << "平均成绩为："<<((student + i)->coursegrade[0] + (student + i)->coursegrade[1] + (student + i)->coursegrade[2] + (student + i)->coursegrade[3] + (student + i)->coursegrade[4]) / 5<<endl;
				break;
			}
		}
	}
}


//找出5门课程都在90分以上的学员以及平均成绩在95分以上的学员
void printEliteStudentData(Student* student) {
	cout << "5门课程都在90分以上的学员名单：" << endl;
	for (int i = 0; i < 6; i++) {
		int signal = 1;
		for (int j = 0; j < 5; j++) {
			if ((student + i)->coursegrade[j] <= 90) {
				signal = 0;
			}
		}
		if (signal) {
			cout << (student + i)->name << endl;
		}
	}
	cout << "平均成绩在95分以上的学员名单：" << endl;
	for (int i = 0; i < 6; i++) {
		int signal = 1;
		for (int j = 0; j < 5; j++) {
			if ((student + i)->coursegrade[j] <= 90) {
				signal = 0;
			}
		}
		if ((((student + i)->coursegrade[0] + (student + i)->coursegrade[1] + (student + i)->coursegrade[2] + (student + i)->coursegrade[3] + (student + i)->coursegrade[4]) / 5) > 95) {
			cout << (student + i)->name << endl;
		}
	}
}

int main()
{
	Student student[6];
	for (int i = 0; i < 6; i++) {
		cout << "请输入第" << i+1 << "个学生的姓名：" << endl;
		cin >> student[i].name;
		cout << "请输入5门成绩（中间以空格断开，按回车键结束）：" << endl;
		for (int j = 0; j < 5; j++) {
			cin >> student[i].coursegrade[j];
		}
	}
	while (true)
	{
		cout << "请选择您需要进行的操作：" << endl;
		cout << "(1)求第一门课程的平均成绩" << endl;
		cout << "(2)找出有一门课程以上不及格的学员，输出该学员的所有成绩和平均成绩" << endl;
		cout << "(3)找出5门课程都在90分以上的学员以及平均成绩在95分以上的学员" << endl;
		cout << "(0)退出" << endl;
		int signal;
		cin >> signal;
		if (signal == 1) { printAverageFirstCourseGrade(student); }
		if (signal == 2) { printFlunkStudentData(student); }
		if (signal == 3) { printEliteStudentData(student); }
		if (signal == 0) { break; }
	}
	return 0;
}

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