What does %o mean in c language

In C language, the %o format specifier is used to format the output of unsigned octal numbers. Usage: Used with variables to format variable values ​​as octal numbers. For example: printf("Octal representation: %o\n", num); Format num into an octal number and output it.

What does %o mean in C language?

In C language, %o is a format specifier used to format the output of an unsigned octal number.

Specific usage:

In formatted input/output functions such as printf() or scanf(), %o should be used with a variable Used together to indicate that the value of this variable should be formatted as an unsigned octal number.

Example:

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

int main() {
  unsigned int num = 15;
  printf("八进制表示：%o\n", num);  // 输出：17
  return 0;
}</code>

In this example, the %o format specifier is used to convert an unsigned integer num (value 15) Format to octal number and output. The output is "17" because 15 is represented as 17 in octal.

Note:

• %o can only be used to format unsigned octal numbers.
• Format specifiers must match the type of the variable.
• The formatted output will follow the octal representation convention of the local machine.

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