Question

c++ only. Please read directions.

I'm looking to have each line re-written in a way that shows we're using the walk through method that the pointer is shifting by each value to solve this. Example far below shows what not to do.  

Rewrite this program and remove the variable declared at line A below. Make your revised program generate the exact same output as the original without using the variable declared at line A.

#include <iostream>
using namespace std;

int main()
{
int num[ 5 ];
int *ptr; // Line A
// rewrite all this code without this declared variable above
// make your revised code do the same thing as this original logic
ptr = num;
*ptr = 100;
p++;
*p = 90;
p = &num[ 2 ];
*p = 80;
p = num + 3;
*p = 70;
p = num;
*(p + 4) = 60;
for (int i = 0; i < 5; i++)
cout << num[ i ] << " ";
cout << endl;

return( 0 );
}

NOT THIS...

#include <iostream>
using namespace std;

int main()
{
int num[ 5 ];
num[0] = 100;
num[1] = 90;
num[2] = 80;
num[3] = 70;
num[4] = 60;
for (int i = 0; i < 5; i++)
cout << num[ i ] << " ";
cout << endl;

return( 0 );
}

Answer 1

#include <iostream>

using namespace std;

int main() {
    int num[5];

    *num = 100;
    *(num + 1) = 90;
    *(num + 2) = 80;
    *(num + 3) = 70;
    *(num + 4) = 60;
    for (int i = 0; i < 5; i++)
        cout << num[i] << " ";
    cout << endl;
    return (0);
}