Functions in C - Hackerrank Solution

Functions in C - Hackerrank Solution :

Welcome Back Guys !!
Today in this post we will discuss Functions in C HAckerrank Practice problem in C programming language.
This problem is set for students to get better knowledge to handle Functions in C.

video solution for problem

Problem Statement For Functions in C hackerrank problem:

Objective

In this challenge, you will learn simple usage of functions in C. Functions are a bunch of statements glued together. A function is provided with zero or more arguments, and it executes the statements on it. Based on the return type, it either returns nothing (void) or something.

A sample syntax for a function is

return_type function_name(arg_type_1 arg_1, arg_type_2 arg_2, ...) {
...
...
...
[if return_type is non void]
return something of type `return_type`;
}
For example, a function to read four variables and return the sum of them can be written as

int sum_of_four(int a, int b, int c, int d) {
int sum = 0;
sum += a;
sum += b;
sum += c;
sum += d;
return sum;
}

Task

You have to write a function int max_of_four(int a, int b, int c, int d) which reads four arguments and returns the greatest of them.

+= : Add and assignment operator. It adds the right operand to the left operand and assigns the result to the left operand.

a += b is equivalent to a = a + b;

Input Format

Input will contain four integers - a,b,c,d, one in each line.

Output Format

Print the greatest of the four integers.
Note: I/O will be automatically handled.

Sample Input

3
4
6
5

Sample Output

Solution Code for Functions in C Hackerrank problem:

Here we are required to write a function which take for int parameter and returns only one int value. I have used conditional operator to solve this problem . As you can see there is duplication of the code here so We can also create one more function to make our life more simple ;)

Method 1:

#include <stdio.h>

Add `int max_of_four(int a, int b, int c, int d)` here.

int max_of_four(int a,int b, int c, int d)

{

int max;

max = a>b?a:b;

max= c>max?c:max;

max = d>max?d:max;

return max;

}

int main() {

int a, b, c, d;

scanf("%d %d %d %d", &a, &b, &c, &d);

int ans = max_of_four(a, b, c, d);

printf("%d", ans);

return 0;

}

Method 2:

#include <stdio.h>

Add `int max_of_four(int a, int b, int c, int d)` here.

int max(int a, int b) {

return a > b ? a : b; // i wrote this function to avoid duplication of code.

}

int max_of_four(int a, int b, int c, int d) {

return max(a, max(b, max(c, d)));

}