What does scanf mean in C language?
scanf function
The scanf function is a standard library function in C language for reading data from standard input.
Usage
Syntax:
int scanf(const char *format, ...);
Among them:
format
: Specify input data format....
: A variable number of parameters, variables representing input data.
Function
The scanf function reads data from the standard input in the specified format and stores the read data in the corresponding variables. It reads input character by character until valid data is encountered or an end-of-file (EOF) or newline character is encountered.
Format specifier
The format parameter uses a format specifier to specify the type of data to be read. Common format specifiers include:
<code>%c:字符 %d:有符号十进制整数 %f:浮点数 %s:字符串</code>
Return
The scanf function returns the number of variables successfully read. If no variables could be read, 0 is returned.
Example
The following example demonstrates how to use the scanf function to read an integer and a floating point number:
int num; float value; scanf("%d %f", &num, &value); printf("整数:%d\n", num); printf("浮点数:%f\n", value);
The above is the detailed content of What does scanf mean in C language?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

typedef struct is used in C language to create structure type aliases to simplify the use of structures. It aliases a new data type to an existing structure by specifying the structure alias. Benefits include enhanced readability, code reuse, and type checking. Note: The structure must be defined before using an alias. The alias must be unique in the program and only valid within the scope in which it is declared.

std is the namespace in C++ that contains components of the standard library. In order to use std, use the "using namespace std;" statement. Using symbols directly from the std namespace can simplify your code, but is recommended only when needed to avoid namespace pollution.

real is the data type used to represent double-precision floating-point numbers in C language. It occupies 8 bytes, has a precision of about 15 decimal places, and the range is [-1.7976931348623157e+308, 1.7976931348623157e+308].

In C language, methods for handling scanf function errors include: 1. Check the format string; 2. Check the input; 3. Check the return value; 4. Set the error flag; 5. Use the error handling function; 6. Use custom errors deal with. To prevent errors, use the correct data types, carefully validate input, check return values, and handle potential errors in your program.

In C language, there are two ways to implement the exponentiation operation: use the pow() function to calculate the power of the second parameter of the first parameter. Define a custom power function, which can be implemented recursively or iteratively: the recursive method continues to double the power until it is 0. The iterative method uses a loop to multiply the base one by one.

Life cycle of C++ smart pointers: Creation: Smart pointers are created when memory is allocated. Ownership transfer: Transfer ownership through a move operation. Release: Memory is released when a smart pointer goes out of scope or is explicitly released. Object destruction: When the pointed object is destroyed, the smart pointer becomes an invalid pointer.

reg is the keyword used for registers in C language and is used to declare pointer variables pointing to registers. Syntax: register data_type *var_name; where data_type is the data type stored in the register, and var_name is the name of the pointer variable. The value in the register can be accessed by dereferencing the pointer, but please note that the available registers vary between platforms and compilers.

ElemType is a C language data type that represents the type of elements in an array or structure. It is used in declaring array element types, defining structure member types, and in generic functions and macros. Note that ElemType is not a reserved word and can be replaced by another name.
