pascals-triangle | 易学教程

python recursive pascal triangle

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问题 After completing an assignment to create pascal's triangle using an iterative function, I have attempted to recreate it using a recursive function. I have gotten to the point where I can get it to produce the individual row corresponding to the number passed in as an argument. But several attempts to have it produce the entire triangle up to and including that row have failed. I even tried writing a separate function which iterates over the range of the input number and calls the recursive

pascal triangle proper formatting java

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问题 so I'm currently working on an assignment that I just can't seem to finish. Well I have everything finished but would like the extra credit. I've been looking around the web and can't really seem to find exactly what I'm looking for. public class PascalTester { public static void main(String[] args) { Scanner kb = new Scanner(System.in); System.out.println("Welcome to the Pascal's Triangle program!"); System.out.println("Please enter the size of the triangle you want"); int size = kb.nextInt(

pascal triangle proper formatting java

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pascal triangle proper formatting java

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pascal triangle proper formatting java

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Recursive Pascals Triangle Layout

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问题 So i've managed to get Pascals Triangle to print successfully in terms of what numbers are printed, however, i can't get the formatting correct using: n = int(input("Enter value of n: ")) def printPascal(n): if n <= 0: #must be positive int return "N must be greater than 0" elif n == 1: #first row is 1, so if only 1 line is wanted, output always 1 return [[1]] else: next_row = [1] #each line begins with 1 outcome = printPascal(n-1) prev_row = outcome[-1] for i in range(len(prev_row)-1): #-1

Recursive to Iterative Pascal's Triangle

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问题 I wonder how to convert a recursive function/class to an iterative one. I have made a recursive Pascal's triangle, and now need to compare it to an iterative. public class RecursivePascal extends ErrorPascal implements Pascal { private int n; RecursivePascal(int n) throws Exception { super(n); this.n = n; } public void printPascal() { printPascal(n, false); } public void printPascal(boolean upsideDown) { printPascal(n, upsideDown); } private void printPascal(int n, boolean upsideDown) { if (n

Recursive to Iterative Pascal's Triangle

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Cannot Get Pascal's Triangle Recursive Program to Work --Java

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问题 I'm trying to write a program for an assignment. The requirements are to create Pascal's Triangle recursively and then print a given line. However, after compiling my program, I get several ArrayIndexOutOfBoundsExceptions. Here is the stack trace: java.lang.ArrayIndexOutOfBoundsException: 10 at pasTriangle.populateT(pasTriangle.java:79) at pasTriangle.populateT(pasTriangle.java:86) at pasTriangle.populateT(pasTriangle.java:86) at pasTriangle.populateT(pasTriangle.java:86) at pasTriangle

Convert normal recursion to tail recursion

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问题 I was wondering if there is some general method to convert a "normal" recursion with foo(...) + foo(...) as the last call to a tail-recursion. For example (scala): def pascal(c: Int, r: Int): Int = { if (c == 0 || c == r) 1 else pascal(c - 1, r - 1) + pascal(c, r - 1) } A general solution for functional languages to convert recursive function to a tail-call equivalent: A simple way is to wrap the non tail-recursive function in the Trampoline monad. def pascalM(c: Int, r: Int): Trampoline[Int]