aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

tasks a-s

Browse source
This commit is contained in:
Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
Download patch file Download diff file Expand all files Collapse all files

42
Task/One-dimensional-cellular-automata/Java/one-dimensional-cellular-automata-1.java Normal file
View file

@ -0,0 +1,42 @@
public class Life{
public static void main(String[] args) throws Exception{
String start= "_###_##_#_#_#_#__#__";
int numGens = 10;
for(int i= 0; i < numGens; i++){
System.out.println("Generation " + i + ": " + start);
start= life(start);
}
}
public static String life(String lastGen){
String newGen= "";
for(int i= 0; i < lastGen.length(); i++){
int neighbors= 0;
if (i == 0){//left edge
neighbors= lastGen.charAt(1) == '#' ? 1 : 0;
} else if (i == lastGen.length() - 1){//right edge
neighbors= lastGen.charAt(i - 1) == '#' ? 1 : 0;
} else{//middle
neighbors= getNeighbors(lastGen.substring(i - 1, i + 2));
}
if (neighbors == 0){//dies or stays dead with no neighbors
newGen+= "_";
}
if (neighbors == 1){//stays with one neighbor
newGen+= lastGen.charAt(i);
}
if (neighbors == 2){//flips with two neighbors
newGen+= lastGen.charAt(i) == '#' ? "_" : "#";
}
}
return newGen;
}
public static int getNeighbors(String group){
int ans= 0;
if (group.charAt(0) == '#') ans++;
if (group.charAt(2) == '#') ans++;
return ans;
}
}