【C++ Primer Plus习题】4.10

问题:

解答:

#include <iostream>
#include <array>
using namespace std;

int main()
{
	array<float, 3> grade;
	float average=0;
	for (int i = 0; i < 3; i++)
	{
		cout << "请输入第" << i + 1 << "次跑40米的成绩:";
		cin >> grade[i];
	}
	for (int i = 0; i < 3; i++)
	{
		cout << "第" << i + 1 << "次跑40米的成绩为:"<<grade[i]<<endl;	
	}
	
	cout << "测试次数为:" << grade.size() << endl;
	average = (grade.at(0) + grade.at(1) + grade.at(2)) / grade.size();
	cout << grade.size() << "次的平均成绩为:" << average << endl;

	return 0;
}

运行结果:

考查点:

• array 数组容器\模版类

注意:

• 需要头文件
  
• 定义
• 

2024年8月24日21:13:07