C language -- printf print base prefix

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problem

Here is a tip to share with you , For some topics, we are required to print the following format

 octal ： 020 0144 0213
 Hexadecimal ：0x231 0x231 0x64

It's simple , We just need to print at the end , Declare the print type of the printed variable .

octal ：%o
Hexadecimal ：%x

Unfortunately, the final result is wrong ！！！
as follows

The result we print out has no base prefix
What shall I do? ？

solve

Use C Language specifier , To print these prefixes

Code

#include<stdio.h>

/*  octal ： %#o  Hexadecimal ： %#x or %#X */
int main(void)
{
    
    int x=100;
    printf("dec = %d; octal = %#o ; hex = %#x or hex = %#X \n",x,x,x);
    return 0;
}

result

It is also a small skill , What if it works one day