What is the use of cin in c++

In C cin is used to read data from standard input (keyboard). Its usage includes: associated with the input source: cin.tie(&cout); reading data using operators according to the data type: integer: >> floating point: >> character: get() or getline() string : getline() Boolean value: >>

The purpose of cin in c

cin is the C standard An input stream object in the library used to read data from standard input (usually the keyboard).

Usage

The syntax of cin is as follows:

<code class="cpp">cin >> variable_name;</code>

Among them, variable_name is the variable to read the data from.

How to use

When using cin to read data, you first need to associate the stream with the input source, usually through cin.tie(&cout). Then, use different operators to read data according to different data types, as shown in the following table:

Data type	Operator
Integer	>>
Floating point number	>>
Character	get() or getline()
String	getline()
Boolean value	>>

For example, to read an integer from the keyboard and Stored in the variable num, you can use the following code:

<code class="cpp">cin.tie(&cout);
int num;
cin >> num;</code>

Features

• Interactive input: cin allows a program to interact with the user and receive input.
• Data type safety: cin will check the validity of the input according to the data type of the variable to prevent incorrect input.
• Simplified input: cin provides an easy way to read different types of data without writing complex input functions.
• Buffering: cin uses buffering to store input data to improve reading efficiency.

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