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import java.util.*; | |
public class pyramid | |
{ | |
//ArrayList<Integer> row1 = new ArrayList<Integer>(); | |
//ArrayList<Integer> row2 = new ArrayList<Integer>(); | |
public pyramid(){ | |
ArrayList<Integer> row = new ArrayList<Integer>(); | |
int totalRows = 6; | |
row.add(2); | |
printArray(row,totalRows); | |
//System.out.println(row); | |
row.add(2); | |
genNums(totalRows-1,row, totalRows); | |
} | |
public void genNums(int moreRows, ArrayList<Integer> row, int totalRows){ | |
//System.out.println(row); | |
printArray(row,totalRows); | |
ArrayList<Integer> row2 = new ArrayList<Integer>(); | |
row2.add(2); | |
for(int i = 0; i < row.size()-1; i++){ | |
row2.add(row.get(i) * row.get(i+1)); | |
} | |
row2.add(2); | |
if(moreRows > 1){ | |
genNums(moreRows-1, row2, totalRows); | |
} | |
} | |
public void printArray(ArrayList<Integer> a, int totalRows){ | |
for(int i = 0; i < (totalRows - a.size()); i++){ | |
System.out.print(" "); | |
} | |
String s = ""; | |
for(int i = 0; i < a.size(); i++){ | |
s = "" + a.get(i); | |
//System.out.println(s); | |
for(int e = 0; e < (4-s.length()); e++){ | |
System.out.print(" "); | |
} | |
System.out.print(a.get(i) + " "); | |
} | |
System.out.println(""); | |
} | |
} |
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