This C++ program allows a user to perform basic arithmetic operations. The user inputs two numbers and selects an operator: addition, subtraction, division, or multiplication. The program then calculates the result and displays it, identifying the operation and the two input numbers. If an invalid operator is selected, the user is prompted to try again.

1. #include<iostream>
//#include<constrea>
#include<cstring>
using namespace std;
main()
{
double x, y, z, hasil;
cout<<"KALKULATOR SEDERHANA nby = http://mohnurfawaiq.blogspot.com n---------------------------
----------n";
string jml="Penjumlahan";
string kurang="Pengurangan";
string bagi="Pembagian";
string kali="Perkalian";
cout<<"nMasukkan nilai 1 = ";
cin>>x;
cout<<"Masukkan nilai 2 = ";
cin>>y;
cout<<"nOperator Aritmatika n1. Penjumlahan n2. Pengurangan n3. Pembagian n4.
Perkaliann";
a:
cout<<"nMasukkan Operator = ";
cin>>z;

2. if(z==1)
{
hasil=x+y;
cout<<"Hasil operasi "<<jml<<", "<<x<<" dan "<<y<<" = "<<hasil<<endl;
}
else if(z==2)
{
hasil=x-y;
cout<<"Hasil operasi "<<kurang<<", "<<x<<" dan "<<y<<" = "<<hasil<<endl;
}
else if(z==3)
{
hasil=x/y;
cout<<"Hasil operasi "<<bagi<<", "<<x<<" dan "<<y<<" = "<<hasil<<endl;
}
else if(z==4)
{
hasil=x*y;
cout<<"Hasil operasi "<<kali<<", "<<x<<" dan "<<y<<" = "<<hasil<<endl;
}
else
{
cout<<"Keyword yang Anda masukkan SALAH!n";
goto a;
}
//getch();
}