Calculator using Switch Case in C++

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Code:

//Calculator using switch statement
#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
	float n1,n2,res;
	int ch;
	cout<<"\n\t================================================================\n"<<endl;
		cout<<"\n\t            Calculator using Switch "<<endl;
		cout<<"\n\t================================================================\n"<<endl;
	do
	{
	cout<<"Enter Two Numbers \n\n";
	cout<<"Number 1 : ";cin>>n1;
	cout<<"Number 2 : ";cin>>n2;
	cout<<"\nEnter choice what you want to calculate\n\n";
	cout<<"1-Addition(+)\n";
	cout<<"2-Subtract(-)\n";
	cout<<"3-Multiply(*)\n";
	cout<<"4-Divide(/)\n";
	cout<<"5-Modulus(%)\n";
	cout<<"6-Exit\n";
	cin>>ch;
	switch(ch)
	{
		case 1:
			cout<<n1<<" + "<<n2<<" = "<<n1+n2<<endl;
			break;
		case 2:
			cout<<n1<<" - "<<n2<<" = "<<n1-n2<<endl;
			break;
		case 3:
			cout<<n1<<" * "<<n2<<" = "<<n1*n2<<endl;
			break;
		case 4:
			cout<<n1<<" / "<<n2<<" = "<<n1/n2<<endl;
			break;
		case 5:
			cout<<(int)n1<<" % "<<(int)n2<<" = "<<(int)n1%(int)n2<<endl;
			break;
		default:
			cout<<"Thank you for using this :) \n";
			getch();
	}
    }
	while(ch>0 && ch<6);
}

Output:

        ================================================================


                    Calculator using Switch

        ================================================================

Enter Two Numbers

Number 1 : 6
Number 2 : 3

Enter choice what you want to calculate

1-Addition(+)
2-Subtract(-)
3-Multiply(*)
4-Divide(/)
5-Modulus(%)
6-Exit
3
6 * 3 = 18
Enter Two Numbers

Number 1 : 4
Number 2 : 1

Enter choice what you want to calculate

1-Addition(+)
2-Subtract(-)
3-Multiply(*)
4-Divide(/)
5-Modulus(%)
6-Exit
2
4 - 1 = 3
Enter Two Numbers

Number 1 : 5
Number 2 : 9

Enter choice what you want to calculate

1-Addition(+)
2-Subtract(-)
3-Multiply(*)
4-Divide(/)
5-Modulus(%)
6-Exit
6
Thank you for using this :)