Uninitialized variable inside a conditional path: determine printed values #include<stdio.h> int main() { int a = 300, b, c; if(a >= 400) b = 300; c = 200; printf("%d, %d, %d ", a, b, c); return 0; }

Introduction / Context:
This checks understanding of definite assignment and reading uninitialized automatic variables. The program conditionally assigns to b but always prints it, regardless of whether the condition executed.

Given Data / Assumptions:

• a = 300 so the condition a >= 400 is false.
• b is an automatic int with indeterminate initial value.
• c is assigned 200 before printing.

Concept / Approach:
In C, local automatic variables without an initializer contain indeterminate values. If the path that initializes b does not execute, printing b invokes undefined behavior (typically it appears as a “garbage” number). a and c are well-defined.

Step-by-Step Solution:
Evaluate condition: 300 >= 400 → false, so b is not set.Set c = 200.Print a (300), b (indeterminate), c (200).

Verification / Alternative check:
Initialize b to a known value (e.g., int b = 0;) to get deterministic output 300, 0, 200. Alternatively, place an else branch that initializes b when the if is false.

Why Other Options Are Wrong:
“300, 300, 200” assumes the if branch executed. “Garbage, 300, 200” misplaces the garbage value on a, which is initialized. “300, 300, Garbage” is wrong because c is definitely assigned.

Common Pitfalls:
Assuming locals default to 0; forgetting that reading an uninitialized variable is undefined; misinterpreting compiler warnings as safe behavior.

Final Answer:
300, Garbage, 200