c++ 二进制文件的读写，只用一个字节保存整数

用bitset作为中介。

代码：

ofstream binfile("F:/Holidays/experiment/test/binfile.bin",ios::binary|ios::out|ios::trunc);
	vector<unsigned > ivec;
	int count=0;
	for(unsigned i=0;i<128;++i){
		binfile.write((char*)&i,1);
	/*ivec.push_back(bb);*/
	}
	binfile.close();
		
	//for(int i=0;i<128;++i)
	//binfile.write((char*)&ivec[i],1);
	//binfile.close();

	ifstream ifile("F:/Holidays/experiment/test/binfile.bin",ios::binary);
	if(!ifile){
		cerr<<"no"<<endl;
		exit(1);
	}

	bitset<8>  t;
	vector<int> ivec2;
	ivec2.clear();
	ifile.read(reinterpret_cast<char*>(&t),1);
		
	while(!ifile.eof()){
		ivec2.push_back(t.to_ulong());
		ifile.read(reinterpret_cast<char*>(&t),1);
	}
	ifile.close();
	for(int i=0;i<ivec2.size();++i)
		cout<<ivec2[i]<<endl;
	
	system("pause");