Quick Answer

try-catch blocks with exception safety guarantees.

Understanding the Issue

C++ exceptions provide error handling without compromising RAII. Follow the strong exception safety guarantee for robust code.

The Problem

This code demonstrates the issue:

Cpp Error 
// Problem: Resource leak
void unsafe() {
    int* ptr = new int[100];
    throw runtime_error("Oops");
    delete[] ptr; // Never reached
}

The Solution

Here's the corrected code:

Cpp Fixed 
// Solution: RAII approach
void safe() {
    vector<int> v(100); // Self-cleaning
    throw runtime_error("No problem");
}

Key Takeaways

Use RAII types to ensure exception safety.