類型轉換函數int()

類型轉換函數int()!!!

#include<iostream.h>
#include<string.h>
#include<math.h>
//using namespace std;
class binary 
{    //定義二進制類
   char bits[16];  //二進制字模數組
public:
    binary(char *a )   //字符串參數構造函數
{
int len,i;
len=strlen(a);
int g=0;
for(i=16-len;i<16;i++)
{
bits[i]=a[g];
g++;
}
for(i=0;i<16-len;i++)
bits[i]='0';
}
  binary(int a)     //整型參數構造函數
{
int i;
for(i=15;i>=0;i--)
{
a%2==0?(bits[i]='0'):(bits[i]='1');
a/=2;
}
}
   friend binary operator +(binary ,binary );   //重載“+”
     friend binary operator -(binary,binary);   //重載“-”
    operator int() //類類型轉換函數
{
int i,sum=0;
for(i=0;i<16;i++)
{sum+=(bits[i]-'0')*int(pow(2,15-i));
}
return sum;
}
void print()
{
int i;
for(i=0;i<16;i++)
cout<<bits[i];
cout<<endl;
}
};
binary operator +(binary s1,binary s2 )
{


int r=int(s1)+int(s2);
binary s3(r);
return s3;
}
binary operator -(binary s1 ,binary s2 )
{


int r=int(s1)-int(s2);
binary s3(r);
return s3;
}
int main()
{
binary n1="1011";
binary n2=int(n1)+15;
binary n3=n1-binary(7);
n1.print();
n2.print();
n3.print();
cout<<int(n2)+5<<endl;
cout<<n2-binary(5)<<endl;
cout<<n3+binary(5)<<endl;
cout<<int(n3)-5<<endl;
return 0;
}