The creation of a unique exception is achievable by overriding the methods and inheriting the behavior of the exception class.
C++ user-defined exception example
Let's explore a basic illustration of a custom exception where the std::exception class is employed to define the exception.
Example
Example
#include <iostream>
#include <exception>
using namespace std;
class MyException : public exception{
public:
const char * what() const throw()
{
return "Attempted to divide by zero!";
}
};
int main()
{
try
{
int x, y;
cout << "Enter the two numbers : ";
cin >> x >> y;
if (y == 0)
{
MyException z;
throw z;
}
else
{
cout << "x / y = " << x/y << endl;
}
}
catch(exception& e)
{
cout << e.what();
}
}
Output:
Output
Enter the two numbers :
10
2
x / y = 5
Output:
Output
Enter the two numbers :
10
0
Attempted to divide by zero!
