C++编程，求你自己活了多少天

/*C++编程，求你自己活了多少天*/
#include<iostream> 
using namespace std;
int main(){
	int y1,y2,m1,m2,d1,d2;
	int panduan(int y,int m,int d);
	double total=0;
	cout<<"please input your birthday:";
	cin>>y1>>m1>>d1;
	cout<<y1<<"/"<<m1<<"/"<<d1<<endl; 
	cout<<"please input now day date:";
	cin>>y2>>m2>>d2;
	cout<<y2<<"/"<<m2<<"/"<<d2<<endl; 
	for(int i=y1;i<y2;i++){
		if((i%4==0&&i%100!=0)||(i%400==0))total+=366;
		else total+=365;   	
	} 
	int duo1,duo2;
    duo1=panduan(y1,m1,d1);
    duo2=panduan(y2,m2,d2);
    total+=duo2-duo1;
    cout<<"you have lived for "<<total<<" days"<<endl;
	return 1; 
}
int panduan(int y ,int m,int d){
	int db[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},{31,29,31,30,31,30,31,31,30,31,30,31}};
	int duo=0,i=0;
  if((y%4==0&&y%100!=0)||(y%400==0))    
    {     
        for(i=0;i<m-1;i++)    
            {    
              duo+=db[1][i];          
            }    
    }else    
    {    
         for(i=0;i<m-1;i++)    
            {    
              duo+=db[0][i];    
           }    
    }
    cout<<(duo+=d)<<endl;
	return duo;    
}