Question

急求！将下列Pascal语言代码转换为C++

任意给定一个自然数N，输出这个自然数的二进制数及位数。如：
输入：N=15
输出：B=1111
L=4
program exp2;
var n,k,r:integer;
s,c:string;
bb:boolean;
begin
write('n=');readln(n);
s:='';
repeat
r:=n mod 2;k:=n div 2;
str(r,c);s:=c+s;
if k=0 then
begin
writeln('b=',s);
writeln('L=',length(s));
bb:=true;
end
else n:=k;
until bb;
end.

Answer 1

#include <iostream>
#include <string>
using std::cout;using std::cin;using std::endl;
using std::string;
int dectobinary(int dec,string &bin)
{
   int len=0;
   while(dec!=0)
   {
       bin=(dec%2?'1':'0')+bin;
       ++len;
       dec=dec/2;
   }
   return len;
}
int main()
{
    int n,len;
    string bin="";
    cout<<"N=";
    cin>>n;
    len=dectobinary(n,bin);
    cout<<"B="<<bin<<"\nL="<<len<<endl;
    return 0;
}