关于c++中进制输入输出

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#include <iostream>
using namespace std;

void main()
{
	int a = 010, b = 10, c = 0X10;//以0开头的数是八进制数，0X开头的是16进制数.

	//以十进制显示数据;
	cout << "DEC：" << endl;
	//cout << dec;//要不要都可以，默认输出时以十进制输出;
	cout << "a= " << a<<endl;
	cout << "b = " << b<<endl;
	cout << "c = " << c<<endl;

	cout << endl;
	
	cout << "OCT" << endl;
	cout << oct;             //指定八进制输出
	cout << "a= " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl;

	cout << endl;

	cout << "HEX" << endl;
	cout << hex;           //指定十六进制输出
	cout << "a= " << a << endl;
	cout << "b = " << b << endl;
	cout << "c = " << c << endl;

	//八，十和十六进制数混合运算并输出
	cout << "a+b+c=";
	cout << dec;
	cout << a + b + c << endl;

	//测试八，十和十六进制输入以及输出
	cout << "DEC:a="; cin >>dec>> a;
	cout << "OCT:b="; cin >>oct>>b;
	cout << "HEX:a="; cin >>hex>>c;  

	//全部指定为八进制输出
	cout <<oct<< "a=" << a << endl;
	cout <<oct<< "b=" << b << endl;
	cout <<oct<< "c=" << c << endl;
}

这是写的一个小的代码程序，有什么不懂得欢迎咨询，大家一起讨论，共同进步。