I need to change this code i have written into class
I need it done urgently, i have tried, and failed numerous times.
/* Assignment 2.cpp
Michael Ainsworth
15737944
15.05.2004
Assignment 2.cpp
Computerized Sketchpad
*/
//Preprocessor Section
#include <iostream>
#include <stdlib.h>
using namespace std;
const int MAXCOMMANDS = 100;
const int SIZE = 20; // grid is SIZE * SIZE
const int RIGHT = 0; // facing right
const int DOWN = 1; // facing down
const int LEFT = 2; // facing left
const int UP = 3; // facing up
//Main Program Section
void ClearFloor(int floor[SIZE][SIZE])
{ // set the floor array to all clear
for (int x = 0; x < SIZE; x++)
{
for (int y = 0; y < SIZE; y++)
{
floor[y][x] = 0;
}
}
}
void ClearCommands(int commandArray[MAXCOMMANDS][2])
{ // empty the commands array
for (int i = 0; i < MAXCOMMANDS; i++)
{
commandArray[i][0] = 0;
commandArray[i][1] = 0;
}
}
void GetCommands(int commandArray[MAXCOMMANDS][2])
{
int count = 0; // count of commands so far received
char buff[255]; // temp buffer for storing info in
int command; // command request
int distance; // distance to move if request is of type 5
int i; // temp value
char loadfile; // should we load from file
bool bLoadFile; // are we loading from file
FILE *fp = NULL; // file pointer we are reading from
cout << "Computerized Sketchpad" << endl;
cout << "Would you like to load your commands from file (y/n) ? ";
cin >> loadfile;
if (loadfile == 'y' || loadfile == 'Y')
bLoadFile = true;
else
bLoadFile = false;
if (!bLoadFile)
{ // not loading from file so request manual command entry
cout << endl;
cout << "Please enter the commands you wish to execute, 1 per line." << endl << endl << "Enter 9 to finish" << endl << endl
<< "Command Meanings" << endl
<< "1:Pen up" << endl
<< "2:Pen down" << endl
<< "3:Turn Right" << endl
<< "4:Turn Left" << endl
<< "5,10: Move Forward 10 spaces" << endl
<< "6:Print the 20-by-20 array" << endl << endl
<< "(in this example)(eg. 5,5 would move the turtle forward 5 spaces)" << endl << endl;
}
else
{ // load commands from file
do
{ // loop until we get a valid file
cout << endl << "Type name of file with type of file example (test.txt)!" << endl << endl
<< "Filename?" ;
cin >> buff;
fp = fopen(buff, "rt"); // open the file as text
if (fp == NULL)
{ // failed to open specified file, let them know
cout << "Unable to open file '" << buff << "' Please try again" << endl;
}
}
while (fp == NULL);
}
do
{ // loop through until we get a command 9, end of file or reach MAXCOMMANDS
command = 0;
distance = 0;
cout << "Command " << count + 1 << " : ";
if (bLoadFile)
{ // load from file so get next line
if (fgets(buff, 255, fp) == NULL)
{ // no line read, set buffer to 9 to trigger exit
strcpy(buff, "9\n");
}
cout << buff; // output to screen what command we got from the file
}
else
{ // get command from user
cin >> buff;
}
i = sscanf(buff, "%i, %i", &command, &distance);
switch (i)
{ // how many items did we parse from the command
case 1: // must be a 1,2,3,4,6 or 9 command
if ((command > 0 && command < 5) || (command == 6) || (command == 9))
{ // is the commands we know
commandArray[count][0] = command;
commandArray[count][1] = 0;
count++;
}
else if (command == 5)
{ // command 5 with no distance, complain
cout << "Move command must have a distance component (eg 5,10), please re-enter" << endl;
}
else
{ // invalid command, complain
cout << "unable to parse line '" << buff << "', please re-enter" << endl;
}
break;
case 2: // must be a 5 command
if (command == 5)
{ // it is a 5 command
commandArray[count][0] = command;
commandArray[count][1] = distance;
count++;
}
else
{ // complain
cout << "unable to parse line '" << buff << "', please re-enter" << endl;
}
break;
default: // unknown, complain
cout << "unable to parse line '" << buff << "', please re-enter" << endl;
break;
}
}
while ((command != 9) && (count < MAXCOMMANDS - 1));
system("pause"); // pause so they can see all commands before processing
commandArray[MAXCOMMANDS - 1][0] = 9; // just in case set the last entry in array to end command
if (fp != NULL) // close the file if it is open
fclose(fp);
return;
}
// Direction the pen is moving
// 3 (up)
// ^
// |
// (left) 2 <-+-> 0 (right)
// |
// v
// 1 (down)
int turnRight(int direction)
{
// right -> down -> left -> up -> right ....
direction++;
if (direction > UP) // rotated past up so reset to facing right
direction = RIGHT;
return direction;
}
int turnLeft(int direction)
{
// up -> left -> down -> right -> up ...
direction--;
if (direction < RIGHT) // rotated past right so reset to facing up
direction = UP;
return direction;
}
void printArray(int floor[SIZE][SIZE])
{ // draw the sketch pad
for (int y = 0; y < SIZE; y++)
{
for (int x = 0; x < SIZE; x++)
{
if (floor[y][x] == 0)
cout << " "; // empty grid spot
else
cout << "*"; // active grid spot
}
cout << endl;
}
}
void movePen(bool penDown, int floor[SIZE][SIZE], int direction, int distance, int &x, int &y)
{
int xmov = 0;
int ymov = 0;
int value;
if (penDown == false)
{ // pen up so set floor values changed to 0 (unset)
value = 0;
}
else
{ // pen down so set floor values to 1 (set)
value = 1;
}
switch (direction)
{ // assuming top,left is 0,0
case LEFT: // xpos will decrease when moving left
xmov = -1;
break;
case RIGHT: // xpos will increase when moving right
xmov = 1;
break;
case UP: // ypos will descrease if moving up
ymov = -1;
break;
case DOWN: // ypos will increase if moving down
ymov = 1;
break;
}
// change the set/unset value of the current pen position
floor[y][x] = value;
for(int i = 0; i < distance; i++)
{
x += xmov; // move our x position
y += ymov; // move our y position
if (x < 0)
x = 0;
if (x >= SIZE)
x = SIZE - 1;
if (y < 0)
y = 0;
if (y >= SIZE)
y = SIZE - 1;
// set/unset the value of the spot we have moved to.
floor[y][x] = value;
}
return;
}
int main(int argc, char* argv[])
{
int floor[SIZE][SIZE] = {0}; // size of the drawing space on screen
int command = 0; // records current command
int distance = 0; // distance to be moved on the screen
int direction = 0; // current direction
int count = 0; // loop counter
int x, y; // x & y pos on sketchpad
int commandArray[MAXCOMMANDS][2] = {0}; // array to record a set of commands
bool penDown = false; // pen position
char again = 'n'; // program flag
do
{
// initialize variables each time
command = 0;
distance = 0;
direction = 0;
count = 0;
x = -1;
y = -1;
penDown = false;
ClearFloor(floor);
ClearCommands(commandArray);
system("cls");
// get the commands
GetCommands(commandArray);
system("cls");
// retrieve first command
command = commandArray[count][0];
while ( (command != 9))
{ // loop through commands until we hit marker
switch ( command )
{
case 1: // penDown
penDown = false;
break;
case 2: // penUp
penDown = true;
break;
case 3: // turn right
direction = turnRight(direction);
break;
case 4: // turn left
direction = turnLeft(direction);
break;
case 5: // move the pen
distance = commandArray[count][1];
movePen(penDown, floor, direction, distance, x, y);
break;
case 6: // draw the sketch pad
cout << endl << "The drawing is:" << endl << endl;
printArray(floor);
break;
}
command = commandArray[++count][0];
}
cout << endl << "Do you want to draw again (y/n)? ";
cin >> again;
}
while ( (again == 'y') || (again == 'Y') );
return 0;
}Thankyou, Mike