How to use scanf in c++

The scanf function is used to read formatted data from standard input. Format specifiers specify the type and format of the input data, such as %d for integers and %f for floating point numbers. The syntax is int scanf(const char *format, ...), where format specifies the format string and ... is a pointer to the variable where the data is to be stored.

Usage of scanf in C

#scanf function is used in the standard I/O library in C to read from Functions for reading formatted data from standard input. It is similar to the printf function and is used to format output.

Syntax:

<code class="cpp">int scanf(const char *format, ...);</code>

Parameters:

• format: Specify the input data Format string.
• ...: A variable number of pointers pointing to variables to store input data.

Return value:

Returns the number of successfully read input items. If EOF (end of file) is encountered, return EOF (-1).

Format specifier:

The format specifier is used to specify the type and format of the input data. Here are some common format specifiers:

Format Specifier	Data Type
%c	Character
%d	Integer
%f	Floating point number
%s	String

##Usage example:

The following example demonstrates how to use the scanf function to read an integer value:

<code class="cpp">int num;
scanf("%d", &num);</code>

This will read an integer value from standard input and store it in the num variable.

Note:

The scanf function may generate buffer overflow errors, so use it with caution.
• The format specifier must match the type and format of the input data.
• The scanf function may return unexpected values ​​if the input data is not in the correct format.

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