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#include <fstream>
#include <iostream>
using namespace std;
void drawUp(fstream &file, bool &down, bool &b, int &numLength)
{
char c = ' ';
//loop to draw line/move pointer
for(int i = 1; i <= numLength; i++)
{
//move pointer up one line
file.seekp(-52, ios::cur);
//if pen is down, draw
if(down)
{
//if bold, use #, otherwise use *
if(b)
{
file << "#";
//move pointer back to offset drawing movement
file.seekp(-1, ios::cur);
}
else
{
//if a bold line is in place, do not overwrite
c = file.peek();
if(c != '#')
{
file << "*";
//move pointer back to offset drawing movement
file.seekp(-1, ios::cur);
}
}
}
}
}
void drawDown(fstream &file, bool &down, bool &b, int &numLength)
{
char c;
//loop to draw line/move pointer
for(int i = 1; i <= numLength; i++)
{
//move pointer down one line
file.seekp(52, ios::cur);
//if pen is down, draw
if(down)
{
//if bold, use #, otherwise use *
if(b)
{
file << "#";
//move pointer back to offset drawing movement
file.seekp(-1, ios::cur);
}
else
{
//if a bold line is in place, do not overwrite
c = file.peek();
if(c != '#')
{
file << "*";
//move pointer back to offset drawing movement
file.seekp(-1, ios::cur);
}
}
}
}
}
void drawLeft(fstream &file, bool &down, bool &b, int &numLength)
{
char c = ' ';
//move pointer to the end of the line in order to draw to the right
file.seekp((0 - numLength), ios::cur);
//loop to draw line
for(int i = 1; i <= numLength; i++)
{
//if pen is down, draw line
if(down)
{
//if bold, use #, otherwise use *
if(b)
file << "#";
else
{
//if a bold line is in place, do not overwrite
c = file.peek();
if(c != '#')
file << "*";
}
}
}
//move pointer back to the end of the line after drawing
file.seekp((0 - numLength), ios::cur);
}
void drawRight(fstream &file, bool &down, bool &b, int &numLength)
{
char c = ' ';
//loop to draw line
for(int i = 1; i <= numLength; i++)
{
//if pen is down, draw line
if(down)
{
//if bold, use #, otherwise use *
if(b)
file << "#";
else
{
//if a bold line is in place, do not overwrite
c = file.peek();
if(c != '#')
file << "*";
}
}
//if pen is up, move without drawing
else
file.seekp(1, ios::cur);
}
}
void printFile(fstream &file)
{
//open a file stream to read characters
ifstream print("paint.txt");
//loop through the file char by char
while(print.good())
//print each character
cout << (char)print.get();
//print newlines to add buffer between prints
cout << endl << endl;
//close the file
print.close();
}
int main()
{
//open file stream for commands
ifstream commands("commands.txt");
//create a new file for output called paint.txt
ofstream create("paint.txt");
create.close();
//convert paint to fstream to access i/o functions.
fstream paint("paint.txt");
char c, direction, ch = ' ';
bool penDown, bold = false;
int length = 0;
//loop to set up 50x50 canvas to draw on
for(int i = 1; i <= 50; i++)
{
for(int j = 1; j <= 50; j++)
paint.put(' ');
paint.put('\n');
}
//reset pointer to start of file
paint.seekp(0, ios::beg);
//loop through commands char by char
while(commands.get(c))
{
//if command is 1, raise the pen
if(c == '1')
penDown = false;
//if command is 2, set pen down
else if(c == '2')
penDown = true;
//if command is 3, prepare to draw
else if(c == '3')
{
//find the direction by skipping possible spaces and commas
do commands.get(ch);
while((ch == ' ')||(ch == ','));
direction = ch;
//find the length by skipping possible spaces and commas
do commands.get(ch);
while((ch == ' ')||(ch == ','));
//reset character position to use >> for length
commands.unget();
commands >> length;
//if direction is up, call drawUp
if((direction == 'N')||(direction == 'n'))
drawUp(paint, penDown, bold, length);
//if direction is down, call drawDown
else if((direction == 'S')||(direction == 's'))
drawDown(paint, penDown, bold, length);
//if direction is right, call drawRight
else if((direction == 'E')||(direction == 'e'))
drawRight(paint, penDown, bold, length);
//otherwise call the only remaining direction, drawLeft
else
drawLeft(paint, penDown, bold, length);
}
//if command is 4, print output to the console
else if(c == '4')
printFile(paint);
//if command is B, set bold to on
else if(c == 'B')
bold = true;
//if command is b, set bold to off
else if(c == 'b')
bold = false;
}
//print final canvas
printFile(paint);
//close files.
commands.close();
paint.close();
return 0;
}
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