Question: (c) You are given a class Line. You need to define a new class DashedLine that inherits from Line……

(c) You are given a class Line. You need to define a new class DashedLine that inherits from Line and additionally has two attributes int *dashes and int *gaps. i. Write the C++ declaration for DashedLine that clearly shows the inher- itance from Line. Make sure that you explicitly declare the default con structor, correctly set access modifiers, and follow information hiding pol- icy with respect to the variables int dashes and int *gaps so that all set/get methods are introduced. 7 marks] ii. In the previous part, assume that Line has a float variable weight defined as a part of the class. What is the access modifier that must be used with weight if we want it to be available to DashedLine but not to other classes that have not inherited Line:? [2 marks]

(c) You are given a class Line. You need to define a new class DashedLine that inherits from Line and additionally has two attributes int *dashes and int *gaps. i. Write the C++ declaration for DashedLine that clearly shows the inher- itance from Line. Make sure that you explicitly declare the default con structor, correctly set access modifiers, and follow information hiding pol- icy with respect to the variables int dashes and int *gaps so that all set/get methods are introduced. 7 marks] ii. In the previous part, assume that Line has a float variable weight defined as a part of the class. What is the access modifier that must be used with weight if we want it to be available to DashedLine but not to other classes that have not inherited Line:? [2 marks]

Expert Answer

answers

/*
Answer for the second part is : protected modifier
If you use protected moifier , it can be inherited by only DashedLine , not by any other classes.

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Answer of the first part is as follows:
*/

#include<bits/stdc++.h>

using namespace std;

class Line
{
protected:
float weight;
public:
Line()
{
cout<<“Line class”<<endl;
}
};

class DashedLine:public Line
{
private:
int *dashes;
int *gaps;
public:
DashedLine()
{
dashes = new int();
gaps = new int();
}
void setDashes(int d)
{
*dashes = d;
}

int getDashes()
{
return *dashes;
}

void setGaps(int g)
{
*gaps = g;
}

int getGaps()
{
return *gaps;
}
};

int main()
{
DashedLine d;
d.setDashes(10);
d.setGaps(5);
cout<<“Dashes:”<<d.getDashes()<<endl;
cout<<“Gaps:”<<d.getGaps()<<endl;
return 0;
}

CA File Edit Search View Project Execute Tools AStyle WindowHelp Executing) - Dev-C 5.11 int getDashes () 41 42 43 return dashes CAUsersiLuc 45 46 47 48 49 50 51 52 53 54 55 L 56 57 58 int main) 59 60 61 62 63 64 65 void setGaps (int g) Line class Dashes : 10 aps:5 gaps = g; Process exited after θ.e5756 seconds with return value θ Press any key to continue . .. _ int getGaps() return gaps DashedLine d; d.setDashes (10); d.setGaps (5); cout<<Dashes: <<d.getDashes ()<<en coutくくGaps: <<d. getGaps()くくendl; return 0; 83 Compiler-Resources dh compile Log e Debug鳳Fin -Cutput Size: 1.83550262451 - Compilation Time: 13.63s Shorten compiler paths Line: Col: 2 Sel: 0 Lines: 66 Insert Done in 0.016 seconds

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