#include <iostream>
#include <limits>
using namespace std;
int main(){
double firstNumber = 0.0, secondNumber = 0.0, result = 0.0;
char operation = 'x';
while (true){
try{
cout << "Birinci sayi, isaret , ikinci sayi :";
cin >> firstNumber >> operation >> secondNumber;
if(cin.fail())
{
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(),'\n');
throw string("Hatali Giris");
}
switch (operation){
case '+':
result = firstNumber + secondNumber;
break;
case '-':
result = firstNumber - secondNumber;
break;
case '*':
result = firstNumber * secondNumber;
break;
case '/':
result = firstNumber / secondNumber;
break;
default:
result = '0';
}
}
catch(string msg)
{
cout << msg << endl;
continue;
}
cout << result << endl;
}
}
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