CEC-Code-Lab

C Function Basics

The basics of prototyping (declaring) implementing (defining) and calling (using) functions in C.

`FunctionBasics.c`


#include <stdio.h>
#include <stdlib.h>

//function prototype
void printGreeting();

//function prototype
float avg(float v1, float v2);


int main(void) {
	printGreeting();
	float someNum = avg(10,20);
	printf("someNum = %f\n", someNum);
	return 0;
}


// implementation - defines the function's actions
void printGreeting() {
	printf("Hi!\n");
	printf("Hello!\n");
}

// implementation - defines the function's actions
float avg(float v1, float v2){
	float average = (v1 + v2) / 2.0;
	return average;
}