#include <iostream>
using namespace std;

void main()
{
	int a = 010, b = 10, c = 0X10;//以0開頭的數是八進位制數，0X開頭的是16進位制數.

	//以十進位制顯示資料;
	cout << "DEC：" << endl;
	//cout << dec;//要不要都可以，預設輸出時以十進位制輸出;
	cout << "a= " << a<<endl;
	cout << "b = " << b<<endl;
	cout << "c = " << c<<endl;

	cout << endl;
	
	cout << "OCT" << endl;
	cout << oct;             //指定八進位制輸出
	cout << "a= " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl;

	cout << endl;

	cout << "HEX" << endl;
	cout << hex;           //指定十六進位制輸出
	cout << "a= " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl;

	//八，十和十六進位制數混合運算並輸出
	cout << "a+b+c=";
	cout << dec;
	cout << a + b + c << endl;

	//測試八，十和十六進位制輸入以及輸出
	cout << "DEC:a="; cin >>dec>> a;
	cout << "OCT:b="; cin >>oct>>b;
	cout << "HEX:a="; cin >>hex>>c;  

	//全部指定為八進位制輸出
	cout <<oct<< "a=" << a << endl;
	cout <<oct<< "b=" << b << endl;
	cout <<oct<< "c=" << c << endl;
}

 

這是寫的一個小的程式碼程式，有什麼不懂得歡迎諮詢，大家一起討論，共同進步。