Input a decimal number, output in octal, hexadecimal

• Question requirements : The octal and hexadecimal numbers corresponding to the decimal integer 1234 will be output.

Enter description :

without

Output description :

Octal and hexadecimal (uppercase letters) corresponding to decimal number 1234, separated by spaces, and required to display a leading 0 before the octal number and a leading 0X before the hexadecimal number

#include<stdio.h>
int main()
{
	printf("%#o,%#X\n", 1234,1234);//直接在printf中进行格式控制
	return 0;
}

Result output:

Code description :

1. Format output

Here, format control is performed directly in printf. If you want to output octal, use %o, and to output hexadecimal, use %X.

Common output formats are:

%d: output integer (usually used to output int type integer)

%f: output a single-precision floating-point number (float type)

%lf: output double-precision floating-point number (double type)

%c: output character

%s: output string

%p: output address format

(For more information, please refer to the website: scanf, fscanf, sscanf, scanf_s, fscanf_s, sscanf_s - cppreference.com )

2. Uppercase and lowercase letters

The title requires the letters in the output hexadecimal to be capitalized, then the X in the output format (%X) should be capitalized. If X is lowercase, the output D will become d.

3. Pilot display

To display the leader, we can add # directly after %