[Solved] What will be the output of this C program?#include <stdio.h> #include "greet.h" int main() { greet(); return 0; }Assuming greet.h contains:void greet() { printf("Hello!\n"); } | C

C - Basics and Execution Environment

What will be the output of this C program?

#include <stdio.h>
#include "greet.h"

int main() {
    greet();
    return 0;
}

Assuming greet.h contains:

void greet() { printf("Hello!\n"); }

ACompilation error due to function definition in header

BHello!

CNo output

DRuntime error

Step-by-Step Solution

Solution:

Step 1: Understand header content and usage
The header greet.h defines a function greet() that prints "Hello!".
Step 2: Analyze program behavior
The program includes the header and calls greet() in main(), so it prints "Hello!".
Final Answer:
Hello! -> Option B
Quick Check:
Function in header runs = prints Hello! [OK]

Quick Trick: Functions can be defined in headers but beware of multiple includes [OK]

Common Mistakes:

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