Write
a C++ program to create a class which contains two dimensional integer array of
size mXn. Write a member function to display sum of all elements of entered
matrix. (Use Dynamic Constructor for allocating memory and Destructor to free
memory of an object)
#include<iostream.h>
#include<conio.h>
class
dynamic_arr
{
int **p;
int r,c,i,j;
public:
dynamic_arr(int x,int y)
{
r=x;
c=y;
p=new int *[r];
for(int i=0;i<r;i++)
{
p[i]=new int[c];
}
}
void getval();
void display();
void addition();
dynamic_arr()
{
cout<<"\n object destroyed";
}
};
void dynamic_arr::getval()
{
int val;
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
cout<<"\n
enter value";
cin>>val;
p[i][j]=val;
}
}
}
void dynamic_arr::display()
{
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
cout<<"\t";
cout<<p[i][j];
}
cout<<"\n";
}
}
void
dynamic_arr::addition()
{
int sum=0;
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
sum=sum+p[i][j];
}
}
cout<<"\naddition
of all elements:"<<sum;
}
void main()
{
clrscr();
int m,n,val;
cout<<"\n
enter rows & columns";
cin>>m>>n;
dynamic_arr
d(m,n);
d.getval();
d.display();
d.addition();
getch();
}
