Several methods of inputting strings in C++

Methods for inputting strings in C: cin: Read strings from the console. getline(cin, string): Read a line of string until a newline character is encountered. stringstream: Process strings as streams, which can read and write data. ifstream: Read a string from a file.

Several ways to input strings in C

In C, there are the following ways to input strings Method:

1. cin

cin is a standard input stream object in C. It can read a string from the console and store it in a variable. Usage example:

<code class="cpp">#include <iostream>
using namespace std;

int main() {
  string input;
  cout << "Enter a string: ";
  cin >> input;
  cout << "You entered: " << input << endl;
  return 0;
}</code>

2. getline(cin, string)

getline(cin, string) function is used to read from the console A line of string until a newline character is encountered. Usage example:

<code class="cpp">#include <iostream>
using namespace std;

int main() {
  string input;
  cout << "Enter a string with spaces: ";
  getline(cin, input);
  cout << "You entered: " << input << endl;
  return 0;
}</code>

3. stringstream

stringstream Allows strings to be processed as streams. It can read and write data from strings. Usage example:

<code class="cpp">#include <sstream>
using namespace std;

int main() {
  string input = "Hello World!";
  stringstream ss(input);
  string word;
  while (ss >> word) {
    cout << word << " ";
  }
  return 0;
}</code>

4. ifstream

##ifstream is used to read data from a file. It can read a string from a file and store it in a variable. Usage example:

<code class="cpp">#include <fstream>
using namespace std;

int main() {
  ifstream file("input.txt");
  string input;
  while (getline(file, input)) {
    cout << input << endl;
  }
  file.close();
  return 0;
}</code>

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