My computer thinks I am gay.

#include <iostream>
#include <stdlib.h>
#include <math.h>
#include <cstdlib>
#include <string>
#include <cstdio>
using namespace std;
int main()
{
	double R1,R2;
	double r3;
	char op;
	cout<<"enter r1"<<endl<<flush;
	string r1;
    cin >> r1;
	cout<<"enter op"<<endl<<flush;
	cin>>op;
	cout<<"enter r2"<<endl<<flush;
	string r2;
    cin >> r2;
	int p = r1.find('b');
	int g = r2.find('b');
	if (p==0){
				string str1= r1.substr(1,4);
				R1 = strtol(str1.c_str(), 0, 2);
				}else{
					 double R1 = stoi(r1);
				}
	if (g==0){
				string str2= r2.substr(1,4);
				R2 = strtol(str2.c_str(), 0, 2);
			}else{
				double R2 = stoi(r2);
				}
	switch (op) {
		case'+': r3=R1+R2; break;
		case'-': r3=R1-R2; break;
		case'*': r3=R1*R2; break;
		case'/':
		if ( fabs(R2) < 1.0E-10 ) {
			cout<<"Divide by zero!"<<flush;
			return 1;
			}
		r3=R1/R2;
		break;
		default:
		cout<<"Error!"<<flush;
		return 1;
		}
	cout<<R1<<' '<<op<<' '<<R2<<" = "<<r3<<endl<<flush;
	float STOP_THIS_SHIT;
	cin>>STOP_THIS_SHIT;
	return 0;
}