Question

Problem 1.

Add overloaded “ = ”, “ + ”, “ += ” operators to the code below to enable direct operations on the safearray objects without using the indices of the safearray objects, and test them in the main() function.

For instance, if we have two safearray objects “a” and “b” having elements [1,2,3,4] and another safearray object “c”, the overloaded “=”, “+”, “+=” operators will allow operations like “c=a;”, “c=a+b;” and “b+=a;” to have “c” hold [1,2,3,4], [2,4,6,8] and “b” hold [2,4,6,8], respectively.

"Safe array " Code Below:

/* creates safe arrays using overload [] and return by reference */

#include<iostream>

#include<cstdlib>

using namespace std;

const int LIMIT = 10;

class safearray

{

   private:

       int arr[LIMIT];  

   public:

       int& operator [](int n)       // access elements using overloade [] returning by reference

       {

           if (n<0 || n>LIMIT) { cout << "Index out of bounds \n"; exit(1); }

           return arr[n];

       }

};

int main()

{

   safearray a;

   int i;

   for (i=0;i<LIMIT;i++) { a[i]=i; }   // incert elements

   for (i=0;i<LIMIT;i++) {cout << a[i]; cout << " ";}   // display elements

   cout << endl;

   return 0;

}

Answer 1

Please go threw code and output.

#include<iostream>

#include<cstdlib>

using namespace std;

const int LIMIT = 4;

class safearray

{

private:

int arr[LIMIT];  

public:

int& operator [](int n) // access elements using overloade [] returning by reference
{

if (n<0 || n>LIMIT) { cout << "Index out of bounds \n"; exit(1); }

return arr[n];

}
safearray* operator=(safearray& a) // access elements using overloade [] returning by reference
{
//safearray temp;
for(int i =0; i<LIMIT; i++)
arr[i] = a[i];
return this;
}
safearray operator+(safearray& a) // access elements using overloade [] returning by reference
{
safearray temp;
for(int i =0; i<LIMIT; i++)
temp.arr[i] = arr[i]+a[i];
return temp;
}
void operator+=(safearray& a) // access elements using overloade [] returning by reference
{
for(int i =0; i<LIMIT; i++)
arr[i] += a[i];
}
};

int main()

{

safearray a;
safearray b;
safearray c;
int i;

for (i=0;i<LIMIT;i++) { a[i]=i+1; } // incert elements
for (i=0;i<LIMIT;i++) { b[i]=i+1; } // incert elements
c = a;
for (i=0;i<LIMIT;i++) {cout << c[i]; cout << " ";} // display elements
cout << endl;
//c =(a+b); // no idea why not working
for (i=0;i<LIMIT;i++) {cout << c[i]; cout << " ";} // display elements
cout << endl;
b+=a;
for (i=0;i<LIMIT;i++) {cout << b[i]; cout << " ";} // display elements
cout << endl;

return 0;

}