line cliping

#include<bits/stdc++.h>
#define intt double
using namespace std ;
int Xmin ,Xmax,Ymin,Ymax ;
int top=8 ,btm=4,rgt=2,lft=1 ;


int gen(int x,int y)
{
    int p=0 ;
    if(x<Xmin)
    p=p|lft ;
    if(x>Xmax)
    p=p|rgt ;
    if(y<Ymin)
    p=p|btm ;
    if(y>Ymax)
    p=p|top ;
    return p ;
}
void call(intt x1,intt y1,intt x2,intt y2)
{
    int c1=gen(x1,y1) ;
    int c2=gen(x2,y2) ;

    bool flag=0 ;

    while(1)
    {
        if(c1==0 && c2==0)
        {
            flag=1 ;
            break ;
        }
        else if(c1&c2)
        {
            flag=0 ;
            break;
        }
        else
        {
             int co;
            intt  x, y;


            if (c1!= 0)  co = c1;

            else  co = c2;


           if (co&lft)
            {
                y = y1 + (y2 - y1) * (Xmin - x1) / (x2 - x1);
                x = Xmin;
            }
            else if (co & rgt)
            {

                y = y1 + (y2 - y1) * (Xmax - x1) / (x2 - x1);
                x = Xmax;
            }
            else if (co& btm)
            {

                x = x1 + (x2 - x1) * (Ymin - y1) / (y2 - y1);
                y = Ymin;
            }
           else if (co & top)
            {

                x = x1 + (x2 - x1) * (Ymax - y1) / (y2 - y1);
                y = Ymax;
            }
             if (co == c1)
            {
                x1 = x;
                y1 = y;
                c1 = gen(x1, y1);
            }
            else
            {
                x2 = x;
                y2 = y;
                c2 = gen(x2, y2);
            }
        }
    }

    if(flag)
    {
        cout<<x1<<" "<<y1<<" "<<x2<<" "<<y2<<endl ;
    }
    else {
        cout<<"Sorry" ;
    }
}

int main()
{
    cout<<"Give me boundary : " ;
    cin>>Xmin>>Ymin>>Xmax>>Ymax ;

    int x1,y1,x2,y2 ;
    cout<<"Give me line \n" ;
    while(cin>>x1>>y1>>x2>>y2)
    {
        call(x1,y1,x2,y2) ;

    }

}