In every step, the user can press one of the keypad numbers to move Frodo left, right, up, down, or diagonally. Use the keypad numbers to determine which direction to move Frodo (e.g., 1 means move downward to the left, 2 means move downward, 3 means move downward to the right, ...). [When you are playing, enable the keypad with the "Num Lock" key above the keypad numbers.] For each move of Frodo, the Black Riders move one square in a random direction. If two Black Riders move into the same square, only display one "B", and afterwards they should continue their movement. If a Black Rider moves into the same square as Frodo, only display a "B" and show the message "Frodo attacked by Black RIder!" and the program should end. Do not allow Black Riders to move off the board. If Frodo moves off the board, GAME OVER!, he dies. The user can also press ' x' to exit the program. Frodo has 80 seconds to complete all 8 stages. After each move, display the stage and the number of remaining seconds. If the time remaining reaches zero, GAME OVER!, the user loses (update the time only after each move). If the player finishes stage 8, print a special congratulations message because Frodo has finally left the Black Forest and wins.
To
make the game more fun to play, include the library <conio.h>,
and use
the
getch() function to read
the input. It does not wait for the user to press the enter key, but
gets
one character immediately.
#include
<conio.h>
// contains getch()
...
char dir =
getch();
// get a character from keyboard without waiting for enter key
Another
way to make the game more fun to play is to use the function:
system("cls");
to
clear the screen. It is in the <cstdlib>
library.
//--------------------------------------------------------------------------
// yourName yourLabSection
// lab10.cpp (model answer)
// The Lord of the Rings
#include <iostream> // contains cout
and
cin
#include <cstdlib> // contains
the
random number generator rand()
#include <ctime> //
contains time() to seed random number
#include <conio.h> // contains
getch()
using namespace std;
struct BlackRider{
int
row;
// current row number of Black Rider
int
col;
// current col number of Black Rider
BlackRider*
next;
// pointer to next Black Rider
};
struct Board{
int
stage;
// current stage number
int
frodoRow;
// current row number of Frodo
int
frodoCol;
// current col number of Frodo
BlackRider*
bhead;
// pointer to Black Rider linked list
};
// initialize the game board with stage=1,
Frodo at upper-left, and 3 BlackRiders at random
void initGame(Board& board);
// game logic
void playGame(Board& board);
// display the game information
void display(Board board, int timeRemaining);
// Frodo makes a move(left, right, up,
down
or diagonal)
void moveFrodo(Board& board);
//BlackRider makes a move (left, right,
up,
down or diagonal)
void moveBlackRiders(Board& board);
// check if game ends
bool gameEnd(Board board, int timeRemaining);
// check to see if Frodo at exit
bool FrodoAtExit(Board board);
// check if any BlackRider and Frodo
located
in the same position
bool blackRiderAttackFrodo(Board board);
// increment the stage of game
void incrementStage(Board& stage, int
timeremain);
// set the number of Black Riders to
3*stage
number
void addBlackRiders(Board& board);
// delete linked list of Black Riders
void deleteBlackRiders(Board& board);
void main(){
Board board;
srand(time(0));
initGame(board);
playGame(board);
}
// game logic
void playGame(Board& board){
int startTime;
int timeRemaining = 80;
// start with 80 seconds to play game
startTime = time(0);
display(board,
timeRemaining);
while(true){
//move Frodo and Black Riders
moveFrodo(board);
moveBlackRiders(board);
//check if game ends. If yes, return to the caller function
timeRemaining = 80 - (time(0) - startTime);
if(gameEnd(board, timeRemaining)){
deleteBlackRiders(board);
return;
}
//advance to next stage
display(board, timeRemaining);
if(FrodoAtExit(board)){
deleteBlackRiders(board);
addBlackRiders(board);
incrementStage(board, timeRemaining);
}
}
}
// Frodo makes a move(left, right, up,
down
or diagonal)
void moveFrodo(Board& board){
char dir;
cout << "Which way
to move (1-9)? Press x to exit: ";
dir = getch();
if
(dir == '1'){ board.frodoRow++; board.frodoCol--; }
else if (dir == '2'){
board.frodoRow++;
}
else if (dir == '3'){
board.frodoRow++; board.frodoCol++; }
else if (dir ==
'4'){
board.frodoCol--; }
else if (dir ==
'5'){
}
else if (dir ==
'6'){
board.frodoCol++; }
else if (dir == '7'){
board.frodoRow--; board.frodoCol--; }
else if (dir == '8'){
board.frodoRow--;
}
else if (dir == '9'){
board.frodoRow--; board.frodoCol++; }
else if (dir == 'x'){
cout << endl << "Exiting!" << endl << "GAME
OVER!"
<< endl;
deleteBlackRiders(board);
exit(0);
}
if(board.frodoRow<0
|| board.frodoRow>7 || board.frodoCol<0 || board.frodoCol>15){
cout << endl << "Frodo falls off the board!!" << endl
<< "GAME OVER!" << endl;
deleteBlackRiders(board);
exit(0);
}
}