# Functions in C | hackerrank practice problem solution

__ Problem:-__

In this challenge, you will learn simple usage of functions in C. Functions are a bunch of statements grouped 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;

}

+= : 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;

Task

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.

Note

There is not built in `max`

function in C. Code that will be reused is often put in a separate function, e.g. `int max(x, y)`

that returns the greater of the two values.

Input Format

Input will contain four integers – , one on 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

`6`

__Solution:-__

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