b/C + + binary, octal, decimal, and hexadecimal representations

the three types of input that the C + + language itself supports are:
1. Decimal. such as 56.
2.16 binary, starting with 0x, such as 0x7a. Output hexadecimal hex keyword formatting, such as cout<3. Eight binary, starting with 0, for example 030. The output octal is formatted with the OCT keyword, such as cout<<oct<<12.

The following sample program:

#include <iostream>
using namespace std;
void Main ()
{
	int a,b,c;
	a=10; Decimal
	b=010;//octal
	c=0x10//16
	cout<< "A=" <<a<<endl;
	cout<< "b=" <<b<<endl;
	cout<< "c=" <<c<<endl;
	cout<< "A (octal) =" <<oct<<a<<endl;
	cout<< "a (hexadecimal) =" <
#include <bitset>
#include <iostream>
int main ()
{
	int c=-1;
	std::bitset<sizeof (int) *8> A (c); 
	std::cout<<a<< "\ n";
	return 0;
}
 


Bitset usage:




Reproduced from: http://www.zhiwenweb.cn/Category/Learning/1228.htm