#include <stdio.h>
int main()
{
	int octalNumber = 0123; //octal number
	int hexadecimalNumber = 0xabc; //hexadecimal number
	int integerNumber = 123; //integer number
	_Bool true = 1;
	_Bool false = 0;
	char letter = 'A';

	printf("Octal number %o is \n\n",octalNumber);
	printf("Octral number %o changed to integer is %i\n\n",octalNumber,(int)octalNumber);

	return 0;
}