What does %x mean in c language

In C language, %x is a format specifier used to format output or input of hexadecimal numbers. It instructs the printf or scanf function to process values ​​of integer type in hexadecimal form.

What does %x mean in C language?

%x is the format specifier in C language used to format the output of hexadecimal numbers. It tells the printf or scanf function to output or input an integer type value in hexadecimal form.

Detailed explanation:

• % symbol represents the beginning of the format specifier.
• x means outputting or inputting hexadecimal numbers.
• If the output number is smaller than the specified width, it will be padded with spaces or zeros (depending on whether there are leading modifiers in the format string).
• If the output number is longer than the specified width, the excess bits will be truncated.

Usage:

Format and output a hexadecimal number:

<code class="c">int num = 0x1234;
printf("十六进制数：%x\n", num);</code>

Format and input a hexadecimal number:

<code class="c">int num;
scanf("%x", &num);</code>

Example:

Output result:

<code>十六进制数：1234</code>

Input result:

<code>1234</code>

The above is the detailed content of What does %x mean in c language. For more information, please follow other related articles on the PHP Chinese website!