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I have made revisions to my program. I gave up on the idea of using functions that return arrays. That was far too complicated for the expected benefit. This latest version compiles and runs correctly with all of the provisions required by the exercise.

What remains is feedback on the efficiency and elegance of the program. What I ask is for constructive comments on how the code for this game could have been written with fewer lines, and making better use of C++ features.

Please bear in mind that I am self-teaching C++ and started in June of this year. This is my first code solving a semi-complex problem. I am not (yet) a C++ code master. (LOL)

```
#include "../../std_lib_facilities.h"
class Random {
public:
Random() {srand((unsigned)time(0));}
};
int rooms[4][4] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 100, 0, 0, 0}; // array of room characterics; four for each of 3 rooms (0-2) and 1 current room (3).
string hazards[3] = {"I smell the wumpus.", "I feel a breeze.", "I hear a bat."}; // array of room hazards.
double upplimit() { // set upper limit for probability range.
double limu = 40 + 40 * rand()/RAND_MAX;
return limu;
}
double lowlimit() { // set lower limit for probability range.
double liml = 60 * rand()/RAND_MAX;
return liml;
}
int room_num() { // randomize room numbers of adjacent rooms.
int rm = rand() % 1000;
return rm;
}
int player() { // validate play made by player.
int play_room = 0;
int play = 0;
cin >> play;
if (play < 1000 || play > 3000) {
cout << "You have entered an invalid play. Please try again." << endl;
cin >> play;
}
play_room = play - 1000;
if (play > 1000 && play < 2000 && play_room != rooms[0][0] && play_room != rooms[1][0] && play_room != rooms[2][0]) {
cout << "You have not chosen a valid room to which to move. Please try again." << endl;
cin >> play;
}
play_room = play - 2000;
if (play > 2000 && play < 3000 && play_room != rooms[0][0] && play_room != rooms[1][0] && play_room != rooms[2][0]) {
cout << "You have not chosen a valid room into which to shoot. Please try again." << endl;
cin >> play;
}
return play;
}
int shoot(int play) {
double prob_wumpus = rand()/RAND_MAX;
int flag = 0;
for (int i = 0; i < 3; i++) { // outcome of shooting at the wumpus.
if (play == 2000 + rooms[i][0]) {
if (rooms[i][1] == 1) {
cout << "You shot the wumpus! YOU WIN!!!" << endl;
flag = 1;
}
if (rooms[i][1] == 0 && prob_wumpus > 0.70) {
cout << "You missed the wumpus. It has come into your room and eaten you!" << endl;
flag = 1;
} else if (rooms[i][1] == 0 && prob_wumpus <= 0.70) {
cout << "You missed the wumpus. Play again." << endl;
flag = 0;
}
}
}
return flag;
}
int move(int play) {
int flag = 0;
for (int i = 0; i < 3; i++) { // outcome of moving to another room.
for (int j = 0; j < 4; j++) {
if (play == 1000 + rooms[i][0]) {
rooms[3][j] = rooms[i][j];
}
}
}
if (rooms[3][1] == 1) {
cout << "The wumpus is in the room. You are eaten!" << endl;
flag = 1;
}
if (rooms[3][2] == 1 && rooms[3][1] == 0) {
cout << "You have fallen into a pit and died!" << endl;
flag = 1;
}
if (rooms[3][3] == 1 && rooms[3][2] == 0 && rooms[3][1] == 0) {
cout << "A bat has taken you to another room!" << endl;
rooms[3][0] = room_num();
cout << "You are now in room " << rooms[3][0] <<"!" << endl;
flag = 0;
}
return flag;
}
int main() {
int flag = 0;
int play = 0;
int shots = 5;
int shot = 0;
cout << "You are safe and in room 100!" << endl;
while (flag == 0) {
if (shot == 0) {
for (int i = 0; i < 3; i++) { // loop for the rooms.
rooms[i][0] = room_num(); // randomizing of room numbers.
if (rooms[i][0] == rooms[3][0]) {i--;} // to prevent the current room from being selected for an adjacent room.
}
for (int i = 0; i < 3; i++) { // loop for the rooms.
for (int j = 1; j < 4; j++) { // loop for the wumpus, pit, and bat.
double prob = 100.0 * rand()/RAND_MAX;
if ((prob > lowlimit() && prob < upplimit()) && (rooms[0][j] == 0 && rooms[1][j] == 0 && rooms[2][j] == 0)) { // randomizing of wumpus, pit, and bat.
rooms[i][j] = 1; // True => 1.
} else {
rooms[i][j] = 0; // False => 0.
}
}
}
}
cout << "There are passage ways to rooms " << rooms[0][0] <<", " << rooms[1][0] <<", and " << rooms[2][0] <<"." << endl;
for (int j = 1; j < 4; j++) { // existence of room hazards.
if (rooms[0][j] == 1 || rooms[1][j] == 1 || rooms[2][j] == 1) {
cout << hazards[j-1] << endl;
}
}
cout << endl;
cout << "Do you wish to move or shoot?" << endl;
cout << "Play 1,000 + the room number for moving, or 2,000 + the room number for shooting." << endl;
cout << "You have " << shots << " shots remaining." << endl; // there is a limit of 5 shots. The game ends if a player runs out of shots.
play = player();
shot = 0;
if (play > 2000) {
flag = shoot(play);
shot = 1;
shots -= 1;
if (shots == 0) {
cout << "You have no more shots!" << endl;
flag = 1;
}
}
if (play < 2000) {
flag = move(play);
if (rooms[3][1] == 0 && rooms[3][2] == 0 && rooms[3][3] == 0) {
cout << "You are safe and in room " << rooms[3][0] <<"!" << endl;
}
}
}
cout << "Game Over." << endl;
keep_window_open();
return 0;
}
```

Thanks in advance.