7.10进制整数转换为2进制字符串

string int2binarystring(int iNumber,int iBits)
	{
	    vector<int> bTemp;
			for(int j=(iBits-1);j>=0;j--)
			{
			    bTemp.push_back((iNumber>>j)&1);
			}
			
			string sBinary;
			for(int k=0;k<bTemp.size();k++)
			{
			    if(0 == bTemp.at(k)
					{
					    sBinary += "0";
					}
					else 
					{
					    sBinary += "1";
					}
			}
			
			return sBinary;
	}