Quick Answer

Warning about variables used before initialization

Understanding the Issue

The compiler warns when a variable might be used before being initialized, which leads to undefined behavior. Always initialize variables before use.

The Problem

This code demonstrates the issue:

Cpp Error 
// Problem: Uninitialized variable
int x;
if (condition) x = 5;
std::cout << x; // Might be uninitialized

The Solution

Here's the corrected code:

Cpp Fixed 
// Solution: Always initialize
int x = 0; // Default value
if (condition) x = 5;
std::cout << x;

Key Takeaways

Initialize variables when declaring them to avoid undefined behavior.