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%s is a format specifier in the C language for input or output strings. It indicates reading or writing a null-terminated character sequence.
The meaning of %s in C language
In C language, %s
Is a format specifier used to output strings.
Detailed description:
When using input/output functions such as printf()
or scanf()
, the format The format specifier specifies the type and format of the data to be input or output. %s
The format specifier is used to specify a string.
A string is a sequence of zero or more characters, terminated by a null character (\0
). Therefore, %s
instructs the function to read or write a null-terminated sequence of characters.
Example:
<code class="c">#include <stdio.h> int main() { char name[20]; printf("请输入您的姓名:"); scanf("%s", name); printf("您的姓名是:%s\n", name); return 0; }</code>
In this example:
Reads a string from the user and stores it in the
name array until a space or newline character is encountered.
Print the string in the
name array to the console in the form of a string.
It should be noted that:
The format specifier only reads or writes starting with null characters The ending string.
, you must ensure that the buffer provided is large enough to accommodate the input string.
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