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C++ program to implement the use of Dynamic Constructor (Matrix Addition):
#include<iostream>
using namespace std;
class matrix{
int **a;
int m,n;
public:
matrix(int x,int y);
~matrix();
void initialize();
void add(matrix p,matrix q);
void display();
};
matrix:: matrix(int x,int y){
m=x;
n=y;
a=new int*[x];
int i,j;
for(i=0;i<x;i++){
a[i]=new int[y];
}
for(i=0;i<x;i++){
for(j=0;j<y;j++){
a[i][j]=0;
}
}
}
matrix:: ~matrix(){
int i;
for(i=0;i<m;i++){
delete a[i];
}
}
void matrix:: initialize(){
cout<<"\nEnter the elements of the matrix..\n";
int i,j;
for(i=0;i<m;i++){
for(j=0;j<n;j++){
cin>>a[i][j];
}
}
}
void matrix:: add(matrix p,matrix q){
int i,j;
for(i=0;i<m;i++){
for(j=0;j<n;j++){
a[i][j]=p.a[i][j]+q.a[i][j];
}
}
}
void matrix:: display(){
int i,j;
for(i=0;i<m;i++){
for(j=0;j<n;j++){
cout<<a[i][j]<<" ";
}
cout<<endl;
}
}
int main(){
int p,q,x,y;
cout<<"Enter the no of rows and columns of first matrix..";
cin>>x>>y;
matrix a(x,y);
a.initialize();
cout<<"\nEnter the no of rows and columns of second matrix..";
cin>>p>>q;
matrix b(p,q);
b.initialize();
matrix c(x,y);
c.add(a,b);
cout<<"\nThe Addition of the matrices is..\n";
c.display();
return 0;
}
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