How to use cout in c language

cout is an object in C used to output data on the console. Its output methods include: using the insertion operator (<<) to output data. Call member functions such as put() to output a single character, write() to output a string or array, and flush() to force the output buffer to be flushed.

How to use cout in C

What is cout?

cout is an object in the C standard library used to output data on the console.

Usage method

There are two main ways to use cout to output data:

• Insertion operator (<< )

Use the insertion operator (<) to output data to the cout stream. For example:

cout << "Hello, world!" << endl;  // 输出 "Hello, world!" 字符串

• Member function

cout object also provides several member functions for outputting data, for example:

• put() - Output a single character
• write() - Output a string or array
• flush() - Force the output buffer to be flushed

Example

The following code demonstrates the use of the cout object:

#include <iostream>

using namespace std;

int main() {
  cout << "Enter your name: ";
  string name;
  getline(cin, name);
  cout << "Hello, " << name << "!" << endl;
  return 0;
}

Note: The

• cout stream buffers output internally and does not output data until the buffer is full or the flush() function is called.
• endl manipulator is used to break the line after output.
• << can also be used to output other data types, such as numbers and Boolean values.

The above is the detailed content of How to use cout in c language. For more information, please follow other related articles on the PHP Chinese website!