9月6学习内容

swift

softwore32:swift software32$ vi fpf.swift

let numberOfStoplights = 4

var population: Int

population = 15422

var unhiredRate: Double = 0.1

let message: String

if popilation <10000{

message = "\(name) is a small town."

}

else if population <1000{

message = "\(name) is a medium town."

}

else{

message = "\(name) is a large town."

}

let description = "name:\(name)\n"

+"stoplights:\(numberOfStoplights)\n"

"fpf.swift" 19L, 388C

算法

public class Flips {
   public static void main(String[] args){
   int N = Integer.pareInt(args[0]);
   Couter heads = new Counter("Head");
   Couter tails = new Counter("Tail");
   for (int i = 1; i<= N; i++)
    if (StdRandom.bernoulli(0.5))
       heads.increment();
      else
      tails.increment();
   Int delte = heads.tally() - tails.tally();
   StdOut.println(heads);
   StdOut.println(tails);
   StdOut.println("delta:"+delta);
}

上课代码2

import edu.printceton.cs.algs4.StdRandom;
import edu.printceton.cs.algs4.StdRandom;

public class Rolis {
  public static void main(String[] args){
  int N = Integer.parseInt(args[0]);
  Counter[] counters = new Counter[sides + 1]
  for (int i = 1; i<=sides;i++)
    counters[i] = new Counter("" + i);
  for (int i = 1; i <= N;i++){
    int result = new Counter(""+ i )
  for (int i = 1; i<=sides;i++)
   stdOut.println(counters[i]);

}

任务累加器

avg'平均数

累加器信息输出。累加多少个数+avg

public class Accumulator {
  private double sum = 0.0;
  private int N = 0;
  public void add(double value){
    sum += value;
    N++;
}
  public double mean(){
   if (N == 0 )
    return 0;
    return sum / N;
        
}
  public String toString(){
  return "Mean(" + N + "values):"
  + String.format("%".3f,mean());
}
}

符攀飞

2 年多前

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