calculator using c++

Write a C++ program create a calculator for an arithmetic operator (+, -, *, /). The program
should take two operands from user and performs the operation on those two operands
depending upon the operator entered by user. Use a switch statement to select the operation.
Finally, display the result.
Some sample interaction with the program might look like this:
Enter first number, operator, second number: 10 / 3
Answer = 3.333333
Do another (y/n)? y
Enter first number, operator, second number: 12 + 100
Answer = 112
Do another (y/n)? n

#include<iostream>
using namespace std;
class calculator
{
    private:
        float n1,n2,result;
        char op;
       
    public:
        void get();
        void calculate();
};

void calculator::get()
{
    cout<<"Enter 1st number"<<" "<<"operator"<<" "<<"Enter 2nd number:";
    cin>>n1;
    cin>>op;
    cin>>n2;
}
void calculator::calculate()
{
    switch(op)
    {
        case '+':
            result=n1+n2;
            cout<<"\nAnswer="<<result;
            break;
           
        case '*':
            result=n1*n2;
            cout<<"\nAnswer="<<result;
            break;
           
        case '/':
            result=n1/n2;
            cout<<"\nAnswer="<<result;
            break;
           
        case '-':
            result=n1-n2;
            cout<<"\nAnswer="<<result;
            break;
    }
}
int main()
{
    char ch;
    calculator obj;
    x:obj.get();
    obj.calculate();
    cout<<"\nDo you want to continue(y/n)?\n";
    cin>>ch;
    if(ch=='y'||ch=='Y')
    goto x;
    return 0;
}