C++IO流文件读写(文本文件,二进制文件)

//使用文件流写文本文件
#include
using namespace std;
#include
#include

int main(void)
{

	//ofstream outfile;
	fstream outfile;
	//outfile.open("User.txt");
	outfile.open("User.txt", ios::out | ios::trunc);

	string name;
	int age;
	while (1) {
		cout << "请输入姓名:[输入Ctrl Z 停止输入]";
		cin >> name;
		if (cin.eof()) {
			break;
		}
		outfile << name<<"\t";
		cout << "请输入年龄:";
		cin >> age;
		outfile << age << endl;;
	}
	outfile.close();
	return 0;
}

 

//使用文件流读文本文件
#include
using namespace std;
#include
#include

//int readFile(void) 
int main(void)
{
	ifstream infile;
	infile.open("User.txt");
	string name;
	int age;
	while (1) {

		infile >> name;
		if (infile.eof()) {
			break;
		}
		cout << name << "\t";
		infile >> age;
		cout << age << endl;
	}
	infile.close();
	return 0;
}

//使用文件流写二进制文本文件
#include
using namespace std;
#include
#include

int main(void) {
	string name;
	int age;
	ofstream outfile;
	outfile.open("User.dat",ios::out | ios::trunc | ios::binary);
	while (1) {
		cout << "请输入姓名:[Ctrl Z退出]";
		cin >> name;
		if (cin.eof()) {
			break;
		}
		outfile << name << "\t";
		cout << "请输入年龄:";
		cin >> age;
		//outfile << age << endl;
		outfile.write((char*)(&age), sizeof(age));
	}
	outfile.close();
	system("pause");
	return 0;
}

//使用文件流读二进制文本文件
#include
#include
#include
using namespace std;

int main(void) {

	ifstream infile;
	infile.open("User.dat");
	string name;
	int age;
	while (1) {
		infile >> name;
		if (infile.eof()) {
			break;
		}
		cout << name<<"\t";
		char temp;
        //二进制读取遇到制表符不会自动跳跃
		infile.read((char*)&temp, sizeof(temp));
		//infile >> age;错误
		infile.read((char*)&age, sizeof(age));
		cout << age << endl;
	}
	infile.close();
	system("pause");
	return 0;
}