Given the code int main() { printf("Hi"); return 0; }, which error occurs if you compile with gcc file.c but forget to include #include <stdio.h>?

medium📝 Debug Q14 of 15

C - Basics and Execution Environment

Given the code int main() { printf("Hi"); return 0; }, which error occurs if you compile with gcc file.c but forget to include #include <stdio.h>?

APreprocessing error

BLinker error

CCompilation warning or error about implicit declaration

DNo error, program runs fine

Step-by-Step Solution

Solution:

Step 1: Identify missing header impact
Without #include <stdio.h>, the compiler does not know the prototype of printf, causing implicit declaration warning or error.
Step 2: Understand error type
This is a compilation warning or error, not a linker or preprocessing error.
Final Answer:
Compilation warning or error about implicit declaration -> Option C
Quick Check:
Missing stdio.h = compilation warning/error [OK]

Quick Trick: Always include stdio.h for printf to avoid compile errors [OK]

Common Mistakes:

Thinking it's a linker error
Assuming no error occurs
Confusing preprocessing errors with compilation errors

Master "Basics and Execution Environment" in C

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More C Quizzes

Given the code int main() { printf("Hi"); return 0; }, which error occurs if you compile with gcc file.c but forget to include #include <stdio.h>?

Step 1: Identify missing header impact

Step 2: Understand error type

Final Answer:

Quick Check:

Want More Practice?