Question

In, C++

Design a class instrument, each instrument has a string family: wood winds, brass, percussion, strings and keyboard. Then derive from class instrument a class type, each type object has a name, create a data file with the following information in it, load the data from the file into an array of 10 type objects. Display the data but do not display any type objects with no data in them.

Wood wind alto flute

Brass fluegelhorn

String guitar

Percussion kettle drum

Keyboard harpsicord

Brass euphoniu

Answer 1

SOLUTION ;-

#include<bits/stdc++.h>
using namespace std;
class instrument{ // this is the instrument family
private:
string family;
public:
void setFamily(string family) //this is a setter function
{
this->family=family;
}
string getFamily() // this is the getter function
{
return family;
}
};
class type:public instrument // this is the class type
{
private:
string name;
public:
void setType(string type) // this will take the line from the file and then assign family and it's name
{
int len=type.length();
char arr[50];
int i=0;
while(type[i]!=' ') // this loop will extract the first word
{
arr[i]=type[i];
i++;
}
if(arr[0]=='W') // as Wood wind is a two word family
{
arr[i]=type[i];
i++;
while(type[i]!=' ')
{
arr[i]=type[i];
i++;
}
}
arr[i]='\0';

setFamily(arr); // set the family of the instrument
i++;
int j=0;
char ar[50];

while(i<len) // this will extract name from the line
{
ar[j]=type[i];
i++;
j++;
  

}
  
ar[j]='\0';
name=ar; // assign the name
}
string getName()
{
return name;
}

};
int main()
{
ifstream file;
file.open("data.txt"); // open the data file
type obj[10];
string line;
int i=0;
while(file)
{
getline(file,line);
obj[i].setType(line);
i++;
}
i--; // one object is copied twice
for(int j=0;j<i;j++)
{
cout<<"\n"<<obj[j].getFamily()<<" "<<obj[j].getName();
}
}

This is a program which explain OOP concept  

if u have any doubtd pls comment below ..ill be solve