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<iostream>
using namespace std;
#include<string>
#include<fstream>
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<iostream>
using namespace std;
#include<fstream>
#include<string>
//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<iostream>
using namespace std;
#include<string>
#include<fstream>
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<iostream>
#include<string>
#include<fstream>
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;
}