PascalTriangle

PascalTriagle.swift

//
//  main.swift
//  swift-sample
//
//  Created by woowabrothers on 2017. 7. 10..
//  Copyright © 2017년 woowabrothers. All rights reserved.
//

import Foundation


func makePascalTriangle(numofRows : Int) -> [[Int]]{
    var result = [[Int]]()
    
    
    for i in 1...numofRows{
        var rowArray = [Int]()
        
        for j in 1...i{
            
            rowArray.append(recurPascal(row: i, column: j))
        }
        
        result.append(rowArray)
    }
    
    return result
}

func recurPascal(row: Int ,column :Int) -> Int {
    
    if(column == 1){
        return 1 ;
    }else if( row == column){
        return 1 ;
    }else{
        return recurPascal(row: row - 1  , column : column - 1) + recurPascal(row: row - 1 , column: column)
    }
}


for argument in CommandLine.arguments {
    switch argument {
        
    default:
        let arg = Int(argument)
        if( arg != nil ){
             print(makePascalTriangle(numofRows: arg!))
        }
          }
}