Peresechenie_krugov

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    float r1,r2,R12,L21;
    float x1,x2,y1,y2;
    cout<<"r1=";
    cin>>r1;
    cout<<"x1=";
    cin>>x1;
    cout<<"y1=";
    cin>>y1;
    cout<<"r2=";
    cin>>r2;
    cout<<"x2=";
    cin>>x2;
    cout<<"y2=";
    cin>>y2;
    L21=r2+r1;
    R12=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
    if(r2==r1){
        if(R12==0||R12<=L21){
            cout<<"peresekayutsa";
        }
        else{
            cout<<"ne peresekayutsa";
        }
    }
    if(r2>r1){
        if(R12<=L21&&(r1+R12>=r2)){
            cout<<"peresekayutsa";
        }
        else{
            cout<<"ne peresekayutsa";
        }
    }
    if(r1>r2){
        if(R12<=L21&&(r2+R12>=r1)){
            cout<<"peresekayutsa";
        }
        else{
            cout<<"ne peresekayutsa";
        }
        }
    }