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dragonCurve.cpp
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dragonCurve.cpp
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#include <string>
#include <iostream>
#include <fstream>
#include <cmath>
std::string subLineX(int n);
std::string subLineY(int n);
std::string drawCurve(int n){
// draw starting curve
return "F" + subLineX(n);
}
std::string subLineX(int n){
// base case
if (n == 1) {
return "";
}
// this is where we call the recursive method
else {
//create left side of the curve
std::string X = subLineX(n-1);
//create right side of the curve
std::string Y = subLineY(n-1);
return X + "+" + Y + "F" + "+";
}
}
std::string subLineY(int n){
// base case
if (n == 1) {
return "";
}
// this is where we call the recursive method
else {
std::string X = subLineX(n-1);
std::string Y = subLineY(n-1);
return " - F" + X + "-" + Y;
}
}
void save(std::string filename, std::string Lsystem){
//write commands to file
std::ofstream file;
file.open(filename);
file << Lsystem;
file.close();
}
int main(int argc, char **argv){
//amount of times it goes
int n = std::stoi(argv[1]);
std::string Lsystem = drawCurve(n);
save("l-system.txt", Lsystem);
}