Project 1 in C++

#include <iostream>
#include <cmath>
#include <iomanip>

using std::endl; using std::cin; using std::cout;


using namespace std;

int main()
{
    long year; // input value from user
    double user_slope; // input value from user

    // Given Constants
    double slope = 0.01173;  
    double intercept = 34.3491;

    cout << "";
    cin >> year;

    cout << "";
    cin >> user_slope;

    double temp = slope * year + intercept;

    cout << fixed << setprecision(2) << temp << endl;
    // 

    // Year 2 and 3 Temp
    long year2 = round(((temp + 7) - intercept)/slope);

    cout << "Year 2: " << year2 << endl;

    long year3 = round(((temp + 7) - intercept)/user_slope);

    cout << "Year 3: " << year3 << endl;
    

}