Usage of cin.getline in c++

The cin.getline() function is used to read a line of text from standard input into the specified string variable. Steps: Declare a character array to store text. Call cin.getline() on the cin object, passing the character array and the maximum number of characters. The terminating character '\0' is automatically added to the end of the text being read.

Usage of cin.getline() in C

Introduction to cin.getline()

cin.getline() is a function in C that reads a line of text from the standard input (cin) and stores it in the specified string variable. It is a member function and belongs to the istream class, so it needs to be called on the cin object.

Syntax

istream& cin.getline(char* str, int num);

Parameters

• str: ​​ is used to store the read text character array.
• num: The maximum number of characters to read (including the terminating '\0' character).

Return value

cin.getline() returns a reference to an istream object that points to the input stream.

Usage

To read a line of text using cin.getline(), follow these steps:

1. Declare a character array to Store text.
2. Call cin.getline() on the cin object, passing the character array and the maximum number of characters.
3. The terminating character '\0' is automatically added to the end of the read text.

Example

char name[50];

// 从用户读取姓名
cin.getline(name, 50);

cout << "Hello, " << name << "!" << endl;

Note

• cin.getline() will skip any preceding Set spaces and tabs.
• If the length of the text read exceeds the specified maximum number of characters, the buffer will be truncated.
• If the user enters a blank line, cin.getline() will not store any text.
• Do not use cin.getline() to read binary data.

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