[C++ Quiz] Intermediate level

Question 1

Can you name the special functions a C++ compiler can create implicitly?
tip answer

Question 2

What are the two ways to achieve automatic type conversion from type X to type Y?
tip answer

Question 3

Which of one of these represents an assignment operation?

1. C c1 = c2;
2. c3 = c4;
3. both

tip answer

Question 4

Given the class Qz4:

class Qz4 {

enum{ arr_l=5 };

int *arr; // array of int

int seed;

char *name;

public:

Qz4(char *str, int i) : name(str), seed(i) {

arr = new int[arr_l];

for(int i=0;i<arr_l;arr[i]=seed + i++);

}

~Qz4() {

delete [] arr;

cout << "arr destroyed for " << name << endl;

}

void print_arr() {

cout << name << ":" << endl;

for(int i=0;i<arr_l;i++) cout << "Element #" << i << "=" << get_arr(i) << endl;

}

void set_arr(int idx, int val) {

arr[idx]=val;

}

int get_arr(int idx) {

return arr[idx];

}

};

Can you predict the output of the program below?

int main() {

Qz4 q1("Q1",0), q2("Q2",10);

q2=q1;

q1.set_arr(0, 32);

q2.set_arr(1, 56);

q1.print_arr();

q2.print_arr();

}

answer