Write a program to find sum of n elements entered by the user. To write this program, allocate memory dynamically using malloc() / calloc() functions or new operator.

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#include<iostream.h>

#include<conio.h>

class sum

{

int *a;

int n;

public:

sum();

~sum();

int s();

};

sum::sum()

{

cout<<"enter the number of elements you want to add"<<endl;

cin>>n;

cout<<"allocating memory via new"<<endl;

a=new int[n];

cout<<"enter the elements"<<endl;

for(int i=0;i<n;i++)

cin>>a[i];

}

sum::~sum()

{

cout<<"deallocating memory using delete"<<endl;

delete a;

}

int sum::s()

{

int sum=0;

for(int i=0;i<n;i++)

sum=sum+a[i];

return(sum);

}

void m()

{

sum obj;

int k=obj.s();

cout<<"The sum is "<<k<<endl;

}

void main()

{

clrscr();

m();

getch();
}

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Output:-