Question

C++:

Write a C++ program with user input, output and using inheritance. Please include comments in your code.

Answer 1

Firstly, Inheritance is the technique of deriving a new class from an old one is called inheritance. The old class is referred to as base class and the new class is referred to as derived class or subclass. Inheritance concept allows programmers to define a class in terms of another class, which makes creating and maintaining application easier. When writing a new class, instead of writing new data member and member functions all over again, programmers can make a bonding of the new class with the old one that the new class should inherit the members of the existing class. A class can get derived from one or more classes, which means it can inherit data and functions from multiple base classes.

I am giving you a program which is in C++ and using simple inheritance i.e., reading or taking input as you asked from user and gets it output by calling other function which is derived from the function in which our input values are stored.

I almost included comments and if you require anything more just drop a comment, I will be glad to help you.

Code is as follows:

#include <iostream>
using namespace std;

//Base class
class std_basic_info
{
private:
char name[30];
int age;
char gender;
public:
void getBasicInfo(void);
void putBasicInfo(void);
};

//function definitions
void std_basic_info::getBasicInfo(void)
{
cout << "Enter student's basic information:" << endl;
cout << "Name?: "; cin >> name;
cout << "Age?: "; cin >> age;
cout << "Gender?: ";cin >> gender;
}

void std_basic_info::putBasicInfo(void)
{
cout << "Name: " << name << ",Age: " << age << ",Gender: " << gender << endl;
}

//Derived class
class std_result_info:public std_basic_info
{
private:
int totalM;
float perc;
char grade;
public:
void getResultInfo(void);
void putResultInfo(void);
};

//function definitions
void std_result_info::getResultInfo(void)
{
cout << "Enter student's result information:" << endl;
cout << "Total Marks?: "; cin >> totalM;
perc= (float)((totalM*100)/500);
cout << "Grade?: ";cin >> grade;
}

void std_result_info::putResultInfo(void)
{
cout << "Total Marks: " << totalM << ",Percentage: " << perc << ",Grade: " << grade << endl;
}

int main()
{
//create object of derived class
std_result_info std;

//read student basic and result information
std.getBasicInfo();
std.getResultInfo();

//print student basic and result information
std.putBasicInfo();
std.putResultInfo();

return 0;
}

//I almost included comments and if you require anything more just drop a comment, I will be glad to help you.