c++ 控制台读取库函数

istream::getline

istream& getline(char* s ,streamsize n);

istream& getline(char* s,streamsize n,char delim);

// istream getline
#include <iostream>
using namespace std;

int main () {
  char name[256], title[256];

  cout << "Enter your name: ";
  cin.getline (name,256);

  cout << "Enter your favourite movie: ";
  cin.getline (title,256);

  cout << name << "'s favourite movie is " << title;

  return 0;
}

Getline

istream& getline(isstream is,string& str,char delim);

istream& getline(isstream is,string& str);

// getline with strings
#include <iostream>
#include <string>
using namespace std;

int main () {
  string str;
  cout << "Please enter full name: ";
  getline (cin,str);
  cout << "Thank you, " << str << ".\n";
}

istream::get

int get();

istream& get ( char& c );

istream& get ( char* s, streamsize n );

istream& get ( char* s, streamsize n, char delim );

istream& get ( streambuf& sb);

istream& get ( streambuf& sb, char delim );

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

int main () {
  char c, str[256];
  ifstream is;

  cout << "Enter the name of an existing text file: ";
  cin.get (str,256);

  is.open (str);        // open file

  while (is.good())     // loop while extraction from file is possible
  {
    c = is.get();       // get character from file
    cout << c;
  }

  is.close();           // close file

  return 0;
}