Question

Q2. Update the given code 2 to implement the following problem:

• Create a class triangle
• Use dynamic memory allocation to create 10 objects of the class triangle
• Set default height and base of all created objects (triangle) to 5 and 10 respectively using a constructor
• Ask user to change only the height of the 5^th triangle
• Print height and base of all (10) triangles to demonstrate that you did the task correctly
• Deallocate the 5^th object
• Print height and base of all (10) objects of the class triangle to demonstrate that you deallocated the 5^th object correctly

Code 2:

class triangle {

int base;

int height;

/* Write your code here

*/

};

int main(){

/*write your code here

}

Answer 1

Explanation:

10 objects are created dynamically and then traversed using for loop. Height is asked from the user and is stored into the 5th object height variable.

Code:

#include <iostream>

using namespace std;

class triangle {

public:
int base;

int height;

triangle()
{
base = 5;
height = 10;
}

};

int main(){

triangle** arr = new triangle*[10];
  
for(int i=0; i<10; i++)
{
arr[i] = new triangle();
}
  
  
cout<<"Enter the height of 5th object: ";
cin>>arr[4]->height;
  
for(int i=0; i<10; i++)
{
cout<<arr[i]->base<<" "<<arr[i]->height<<endl;
}
  
delete arr[4];
cout<<endl;
  
for(int i=0; i<10; i++)
{
cout<<arr[i]->base<<" "<<arr[i]->height<<endl;
}
  
  
  

}

Output:

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