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The role of scanf in c language

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Release： 2024-05-02 19:21:44

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In C language, the scanf function is used to read data from standard input and store it in a specified variable. Usage steps: 1. Declare the variables to be read; 2. Call the scanf function and specify the format and variables to be read.

The role of scanf in c language

The role of scanf function in C language

In C language, scanf function is used to read from standard input Reads data and stores it in the specified variable. Its prototype is as follows:

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

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where:

format is a string specifying the format of the input data.
... is a variable parameter list used to specify the variables to be read.

Usage

To use the scanf function, you need to follow the following steps:

Declare the variable from which data is to be read.
Call the scanf function and specify the format and variables to be read.
The scanf function will read data from standard input and store it in the specified variable.

Format specifiers

The following format specifiers are used in the format string to specify the type of data to be read:

##%dInteger%fFloating point number%cCharacter%sString

Format specifier	Data type

Example

Here is an example of reading two integers and one character:

<code class="c">int a, b;
char c;
scanf("%d %d %c", &a, &b, &c);</code>

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In this example:

%d specifies that the first parameter a is an integer.
%d Specifies that the second parameter b is an integer.
%c Specifies the third parameter c is a character.

When the scanf function executes, it reads data from standard input and stores it in variables

a, b, and c .

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