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:

<code class="cpp">cout << "Hello, world!" << endl;  // 输出 "Hello, world!" 字符串</code>

• 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 

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!