#include <iostream>
#include <cmath>
using namespace std;
/*
Create 2 classes:
    1. SimpleCalculator - Takes input of 2 numbers using a utility function and perfoms +, -, *, / and displays the results using another function.
    2. ScientificCalculator - Takes input of 2 numbers using a utility function and perfoms any four scientific operations of your chioice and displays the results using another function.

    Create another class HybridCalculator and inherit it using these 2 classes:
    Q1. What type of Inheritance are you using? ---> Multiple inheritance
    Q2. Which mode of Inheritance are you using? ---> public SimpleCalculator, public ScientificCalculator
    Q3. Create an object of HybridCalculator and display results of simple and scientific calculator.
    Q4. How is code reusability implemented?
*/
class SimpleCalculator {
    int a, b;
    public:
        void getDataSimple()
        {
            cout<<"Enter the value of a"<<endl;
            cin>>a;
            cout<<"Enter the value of b"<<endl;
            cin>>b;
        }

        void performOperationsSimple(){
            cout<<"The value of a + b is: "<<a + b<<endl;
            cout<<"The value of a - b is: "<<a - b<<endl;
            cout<<"The value of a * b is: "<<a * b<<endl;
            cout<<"The value of a / b is: "<<a / b<<endl;
        }
};

class ScientificCalculator{
    int a, b;

    public:
        void getDataScientific()
        {
            cout << "Enter the value of a" << endl;
            cin >> a;
            cout << "Enter the value of b" << endl;
            cin >> b;
        }

        void performOperationsScientific()
        { 
            cout << "The value of cos(a) is: " << cos(a) << endl;
            cout << "The value of sin(a) is: " << sin(a) << endl;
            cout << "The value of exp(a) is: " << exp(a) << endl;
            cout << "The value of tan(a) is: " << tan(a) << endl;
        }
};

class HybridCalculator : public SimpleCalculator, public ScientificCalculator{
    
};
int main()
{
    // SimpleCalculator calc;
    // ScientificCalculator calc;
    // calc.getData();
    // calc.performOperations();
    HybridCalculator calc;
    calc.getDataScientific();
    calc.performOperationsScientific();
    calc.getDataSimple();
    calc.performOperationsSimple();
    
    return 0;
}
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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
}