The meaning of scanf in c language

The scanf function is used in C language to read data from the standard input. It uses a formatted string and a pointer to a variable to obtain a value of a specific type. The format specifiers that can be used include %c (character), %d (decimal integer), %f (floating point), and %s (string).

The meaning of scanf in C language

scanf is a standard library function in C language, used for Read data from standard input. It is an interactive function that allows the user to enter values ​​at runtime.

How to use scanf

The syntax of the scanf function is as follows:

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

Among them:

• format: A format string specifying the type of value to be read.
• ...: A variable parameter list containing pointers to variables to be read.

Format specifiers

A format string consists of a set of format specifiers that specify the type of value to be read. . The following are the most common format specifiers:

• %c: Characters
• %d: Decimal integer
• %f：Floating point number
• %s：String

Example

The following The code example demonstrates how to use scanf to read an integer entered by the user:

<code class="c">#include <stdio.h>

int main() {
  int number;
  printf("Enter an integer: ");
  scanf("%d", &number);
  printf("You entered: %d\n", number);
  return 0;
}</code>

When you run the program, it prompts the user for an integer and then stores the input in a number variable.

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