Biggest of 2 Numbers Using Function: C++

Find the biggest of two numbers using function and ternary operator.

Basics of functions:

A function is a sub program to perform a specific task.
OR
a group of instructions to perform specific task.

Along with main() it is possible to define our own functions by following these steps:
1. Function prototype or Function declaration.
2. Function call.
3. Function definition.

Function Prototype:

Giving information about the function such as return type, function name and arguments type to the compiler is known as function prototype; It is written at the declaration section.
Syntax:

< return_type > < function_name >( arguments_type );

Example:
int findsum(int a, int b);
float findsum(int a, int b);
void findsum(int a, int b);
int findsum(int a[], int size);
int findsum(int, int);

Function Definition:
Writing the actual code of the function in a block. It is at this stage the task of the function is defined. It is written after the main function.
Syntax:

< return_type >< function_name >(parameters)
{
 
}

Example:

int findsum(int a, int b)
{
 int sum;
 
 sum = a + b;
 return(sum);
}

Function Call:
It is a technique used to invoke a function.
Syntax:

[variable] < function_name >([arguments]);

Example:
res = findsum(10, 20);
res = findsum(x, y);
res = findsum();

Full Source Code:

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#include< iostream.h >
#include< conio.h >
 
void main()
{
  int Big(int x,int y);  // Prototype
 
  int a, b;
  clrscr();
 
  cout< <"Enter 2 numbers\n";
  cin>>a>>b;
 
  int res = Big(a, b);   // Function call
 
  cout< <"Biggest = "<<res;
  getch();
}
 
int Big(int x, int y)   // Function Definition
{
  return( x>y?x:y );
}

You must also watch these videos, before continuing with this program:
Find Biggest of 2 Numbers: C++
Biggest of Two Numbers Using Ternary Operator: C++

Video Tutorial: Biggest of 2 Numbers Using Function

Output:
Enter 2 numbers
420
305
Biggest = 420