# Functions in C++ Hacker Rank Solution

Hello coders, In this post, you will learn how to solve the Functions in C++ Hacker Rank Solution. This problem is a part of the HackerRank C++ Programming Series.

## Functions in C++ Hacker Rank Solution

### Problem

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;
}
```

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.
PS: I/O will be automatically handled.

```3
4
6
5
```

`6`

### Functions in C++ Hacker Rank Solution

```#include
using namespace std;
int max_of_four(int a,int b,int c,int d)
{
int max = 0;
if(a>=b && a>=c && a>=d)
{
max = a;
}
else if(b>=a && b>=c && b>=d)
{
max = b;
}
else if(c>=a && c>=b && c>=d)
{
max = c;
}
else
{
max = d;
}
return max;
}
int main() {
int a, b, c, d;
cin>>a>>b>>c>>d;
int ans = max_of_four(a, b, c, d);
cout<<ans;
return 0;
}```

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