## Algorithm

Problem Name: Functions

In this HackerRank Functions in C++ programming problem solution,

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.

The 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 return the sum of four parameters 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;
}
``````

Write a function int max_of_four(int a, int b, int c, int d) which returns the maximum of the four arguments it receives.

``````+= : 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 per line.

Output Format

Return the greatest of the four integers.
PS: I/O will be automatically handled.

Sample Input

``````3
4
6
5
``````

Sample Output

``````6
``````

## Code Examples

### #1 Code Example with C++ Programming

```Code - C++ Programming```

``````
#include <iostream>
#include <cstdio>
using namespace std;

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

int main(void)
{
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\n", ans);

return 0;
}

int max_of_four(int a, int b, int c, int d)
{
if(a >= b && a >= c && a >= d)
return a;
else if(b >= a && b >= c && b >= d)
return b;
else if(c >= b && c >= a && c >= d)
return c;
else
return d;
}
``````
Copy The Code &

Input

cmd
3 4 6 5

Output

cmd
6