In C language, %s represents a formatted string placeholder, used to insert string values: when printf or scanf encounters %s, it will look for the string pointer that follows it parameter. This pointer points to the string to be printed or read. If width is specified, the function prints or reads the specified number of characters.
%s means in C language
In C language, %s
is a formatted string placeholder used to insert string values into printf
, scanf
, and other input/output functions.
Detailed description
%s
Placeholders work as follows:
- When
printf When the
orscanf
function encounters%s
, it looks for the string pointer argument immediately following it. - This pointer points to the string to be printed or read.
- If width is specified in the format string, the function will print or read the specified number of characters.
Example
The following code snippet demonstrates how to use the %s
placeholder:
#include <stdio.h> int main() { char name[20]; // 声明一个字符数组来存储字符串 // 获取用户的姓名 printf("请输入你的姓名:"); scanf("%s", name); // `%s` 读取输入并将其存储在 `name` 数组中 // 打印用户姓名 printf("你的姓名是:%s", name); // `%s` 打印存储在 `name` 数组中的字符串 return 0; }
in In this example:
-
scanf("%s", name);
Reads input from the user and stores it in thename
character array middle. -
printf("Your name is: %s", name);
Use%s
placeholder to print the array stored inname
string in .
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