C++ Exceptions – Catch Errors, Don’t Crash

🚨 C++ Exceptions – Catch Errors, Don’t Crash

In real life, when something goes wrong, we handle it. C++ does the same using exceptions. You can throw errors and catch them before your program crashes. 🧯

This feature helps build safer and more reliable software. Instead of failing silently or crashing hard, you get a chance to fix things on the fly.

🧠 Basic Syntax

try {
    // Code that might cause error
}
catch (type e) {
    // Handle the error
}

You use throw to raise an exception, and catch to handle it.

🔧 Example: Divide by Zero

#include <iostream>
using namespace std;

int main() {
    int a = 10, b = 0;
    try {
        if (b == 0)
            throw "Cannot divide by zero!";
        cout << a / b << endl;
    } catch (const char* msg) {
        cout << "Error: " << msg << endl;
    }

    return 0;
}

Try It Now

🛠️ Example: Throwing Different Types

#include <iostream>
using namespace std;

void checkAge(int age) {
    if (age < 18)
        throw age;
    cout << "Access granted!" << endl;
}

int main() {
    try {
        checkAge(15);
    } catch (int x) {
        cout << "Access denied. Age is " << x << "." << endl;
    }

    return 0;
}

Try It Now

📝 Key Points

try block wraps risky code.
throw sends out the error.
catch grabs it and handles it gracefully.
You can catch multiple types using multiple catch blocks.

🎯 Why Use Exceptions?

Make your program safe and stable.
Handle unexpected errors at runtime.
Improve user experience by avoiding crashes.

✅ Summary

Exceptions help catch and fix errors while your program is running.
Use try, throw, and catch to manage unexpected situations.
Always plan for errors—better safe than sorry! 💡