c++的流类库和输入输出

Question

 

Answer 1

参考代码如下： 

#include<iostream>
#include <fstream>

using namespace std;


int main()
{
	int a[20];
	ofstream myfile1("f1.txt", ios::out);

	cout << "请输入10个数值(用空格隔开)" << endl;
	for (int i = 0; i < 10; i++)
	{
		cin >> a[i];
		myfile1 << a[i] << endl;
	}
	myfile1.close();



	ifstream myfile2("f1.txt", ios::in);

	if (!myfile2.is_open())
	{
		cout << "f1.txt打开失败！" << endl;
		return 0;
	}

	int b[20];

	cout << "所有成绩：";
	int nMax = 0;
	for (int i = 0; i < 10; i++)
	{
		myfile2 >> b[i];
		cout << b[i] << " ";
		if (nMax < b[i])
			nMax = b[i];
	}

	myfile2.close();

	cout << endl << "最高成绩：" << nMax << endl;

	return 0;
}