二进制加法代码2

#include<iostream>
using namespace std;
int* sum_binary_array(bool *a,bool *b,int n)
{
	int *c=new int[n+1];
	int flag=0,key=0;
	for(int i=0;i<n;++i)
	{
       key=a[i]+b[i]+flag;
	   c[i]=key%2;
	   if(key>1)
		   flag=1;
	   else
		   flag=0;
	}
	if(flag==1)
		c[n]=1;
	return c;
}
int main()
{
	bool a[]={1,0,1,1},b[]={0,1,1,0};
	int *c=sum_binary_array(a,b,4);
	cout<<" ";
	for(int i=3;i>=0;--i)
        cout<<a[i]<<" ";
	cout<<endl<<" ";
		for(int i=3;i>=0;--i)
        cout<<b[i]<<" ";
	cout<<endl;
	for(int i=4;i>=0;--i)
		cout<<c[i]<<" ";
	cout<<endl;
}