C++ biteset

最新推荐文章于 2025-03-14 20:12:48 发布

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最新推荐文章于 2025-03-14 20:12:48 发布

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分类专栏： C++ 文章标签： c++ bitset

本文链接：https://blog.youkuaiyun.com/yang382197207/article/details/43529135

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本文通过一个C++程序展示了bitset的基本使用方法，包括初始化、位操作如翻转、设置和重置等，并展示了如何检查bitset中1的数量及转换为无符号长整型。

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#include <iostream>
#include <bitset>
using namespace std;


int main()
{
	
	bitset<8> b1;
	bitset<8> b2("00001111");//不能用非0\1字符初始化或赋值，运行期错误
	bitset<8> b3(0xff);
	bitset<16> b4(0xff);

	if (b2.any())//has 1 bit ?
	{
		cout << "b2 has 1 in bit" << endl;
	}
	cout << "b2 is  " << b2 << endl;
	cout << "b2 size is  " << b2.size() << endl;
	cout << "b2 has " << b2.count() << " 1 in bitset" << endl;
	cout << "the num b2 translate is  " << b2.to_ulong() << endl;
	for (int index = 0; index != 8; ++index)
		cout << b2[index] << " "; 
	cout << endl;
	b2.flip(); 
	//for (int index = 0; index != 8; ++index)
	//	b2.flip(index); 
	for (int index = 0; index != 8; ++index)
		cout << b2[index] << " "; 
	cout << endl;
	b2.set(); 
	//for (int index = 0; index != 8; ++index)
	//	b2.set(index);
	for (int index = 0; index != 8; ++index)
		cout << b2[index] << " "; 
	cout << endl;
	b2.reset(); 
	//for (int index = 0; index != 8; ++index)
	//	b2.reset(index); 
	for (int index = 0; index != 8; ++index)
		cout << b2[index] << " "; 
	cout << endl;
	
	cout << "b1 is  " << b1 << endl;
	cout << "b3 is  " << b3 << endl;
	cout << "b4 is  " << b4 << endl;


	return 0;
}