/*Create two classes named Mammals and MarineAnimals. Create another class named BlueWhale which inherits both the above classes.
Now, create a function in each of these classes which prints "I am mammal", "I am a marine animal" 
and "I belong to both the categories: Mammals as well as Marine Animals" respectively. 
Now, create an object for each of the above class and try calling
1 - function of Mammals by the object of Mammal
2 - function of MarineAnimal by the object of MarineAnimal
3 - function of BlueWhale by the object of BlueWhale
4 - function of each of its parent by the object of BlueWhale*/

#include<iostream>
using namespace std;
class Mammals
{
	public:
		void mammals()
		{
			cout<<"I am mammals.\n";
		}
	
};
class MarineAnimals
{
	public:
		void marine()
		{
			cout<<"I am a marine animal.\n";
		}
	
};
class BlueWhale:public Mammals , public MarineAnimals
{
	public:
		void both()
		{
			cout<<"I belong to both the categories: Mammals as well as Marine Animals.";
		}
};
int main()
{
	Mammals obj1;
	MarineAnimals obj2;
	BlueWhale obj3;
    cout<<obj1.mammals();
	cout<<obj2.marine()<<endl<<obj3.both()<<endl;
	cout<<obj3.mammals()<<endl<<obj3.marine();
	return 0;
}

C++ Online Compiler

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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}