C++ 十进制转换为二进制的实例代码

#include <iostream>
#include <fstream>
#include <string>
#include <algorithm>
using namespace std;

string s;
int main(int argc,char * argv[])
{
    int n;
    while(cin>>n)
    {
        if(n==0)
        {
                cout<<"          0-->0\n";
                continue;
        }
        s=" ";
        for(int a=n;a;a=a/2)
        {
                s=s+(a%2?'1':'0');
        }
        std::reverse(s.begin(),s.end());
        const char *sss=s.c_str();
        cout.width(11);
        cout<<n<<(n<0?"-->-":"-->")<<sss<<"\n";
    }
    system("pause");
    return 0;
}