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Ghost.java
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Ghost.java
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import java.util.Scanner;
public class Ghost {
public static void freeBlocksAround(char[][] chMap, int[][] coords, int frei){
for (int i = 0; i < coords.length; i++) {
int coordX= coords[i][0];
int coordY= coords[i][1];
if(chMap[coordX-1][coordY]==' '){
frei++;
}if(chMap[coordX][coordY-1]==' '){
frei++;
}if(chMap[coordX+1][coordY]==' '){
frei++;
}if(chMap[coordX][coordY+1]==' '){
frei++;
}
}
int[][]oldChoords=coords;
coords=new int[frei][2];
for (int i = 0; i < oldChoords.length; i++) {
boolean keinFeldOben=true, keinFeldLinks=true, keinFeldUnten=true, keinFeldRechts = true;
int coordX= coords[i][0];
int coordY= coords[i][1];
if(chMap[coordX-1][coordY]==' '&& keinFeldOben){
coords[i][0]=chMap[coordX-1][coordY];
keinFeldOben=false;
}else if(chMap[coordX][coordY-1]==' '&& keinFeldLinks){
coords[i][0]=chMap[coordX][coordY-1];
keinFeldLinks=false;
}else if(chMap[coordX+1][coordY]==' '&&keinFeldUnten){
coords[i][0]=chMap[coordX+1][coordY];
keinFeldUnten=false;
}else if(chMap[coordX][coordY+1]==' '&&keinFeldRechts){
coords[i][0]=chMap[coordX][coordY+1];
keinFeldRechts = false;
}
}
}
public static int countGhosts(char[][] chMap){
int gCounter=0;
for (int y = 0; y < chMap.length; y++) {
for (int j = 0; j < chMap[y].length; j++) {
if(chMap[y][j]=='G'){gCounter++;}
}
}
return gCounter;
}
public static void main(String[]args){ //input: Zahl N z.B. 8
//int[][]coordinates; //########
Scanner myScanner = new Scanner(System.in); //# # #
int N = Integer.parseInt(myScanner.nextLine()); //# # ## #
String[]map=new String[N]; //# # #G#
for(int i = 0; i<map.length; i++){ //# P###
map[i]=myScanner.nextLine(); //#### # #
} //#G #G#
char[][] chMap = new char[map.length][]; //########
for (int x = 0; x < map.length; x++) { //G=Ghost P=Pacman #=Wand ' '=Freierweg
chMap[x]=map[x].toCharArray();
}
System.out.println(countGhosts(chMap));
myScanner.close();
}
}