excep_handling.cpp

#include <iostream>
#include<string>
using namespace std;
int main(){
	int num1,num2;
	char op;
	cout<<"Simple calculator"<<endl;
	cout<<"Enter first number:"<<endl;
cin>>num1;
	cout<<"Enter second number:"<<endl;
	cin>>num2;
	cout<<"Enter an operator(+,-,*,/):";
	cin>>op;
	try{
		if(op!='+'&& op!='-'&& op!='*'&& op!='/')
		throw string("Invalid operator!please use +,-,*or/.");
		if(num1<0 ||num2<0)
		throw -1.5;
		if(op=='/'&&num2==0)
		throw 0;
		
		double result;
		switch(op){
			case'+':result =num1+num2;break;
			case'-':result =num1-num2;break;
			case'*':result =num1*num2;break;
			case'/':result =(double)num1/num2;break;
		}
		cout<<"Result: "<<result<<endl;
	}
	catch (int e){
		cout<<"Error:Division by zero is not allowed!"<<endl;
	}
	catch (double e){
		cout<<"Error:Negative numbers are not allowed!"<<endl;
	}
	catch (string e){
		cout<<"Error:"<<e<<endl;
}
	cout<<"Program execution completed successfully."<<endl;
	return 0;
}