Modify the program to include the following changes 1) make function add of type AltMoney. Thus, this function now computes the sum of dollars and cents and returns it as AltMoney. 2) add a new friend function, subtract, that computes the subtraction of one money from the other. 3) Make read_money a member function.

#include #include using namespace std;

class AltMoney { public: AltMoney(); AltMoney(int d, int c);

friend void add(AltMoney m1, AltMoney m2, AltMoney& sum); void display_money( ); private: int dollars; int cents; };

void read_money(int& d, int& c);

int main( ) { int d, c; AltMoney m1, m2, sum;

sum = AltMoney(0,0);

read_money(d, c); m1 = AltMoney(d,c); cout << "The first money is:"; m1.display_money();

read_money(d, c); m2 = AltMoney(d,c); cout << "The second money is:"; m2.display_money();

add(m1,m2, sum); cout << "The sum is:"; sum.display_money();

return 0; }

AltMoney::AltMoney() { }

AltMoney::AltMoney(int d, int c) { dollars = d; cents = c; }

void AltMoney::display_money() { cout << "$" << dollars << "."; if(cents <= 9) cout << "0"; //to display a 0 in the left for numbers less than 10 cout << cents << endl; }

void add(AltMoney m1, AltMoney m2, AltMoney& sum) { int extra = 0; sum.cents = m1.cents + m2.cents; if(sum.cents >=100){ sum.cents = sum.cents - 100; extra = 1; } sum.dollars = m1.dollars + m2.dollars + extra; }

void read_money(int& d, int& c) { cout << "Enter dollar "; cin >> d; cout << "Enter cents "; cin >> c; if( d < 0 || c < 0) { cout << "Invalid dollars and cents, negative values "; exit(1); } }