模拟扔硬币100次

import java.util.Random;

public class Practice_07 {
	public static void main(String[] args){
		Random r = new Random();
		int b;
		int a;
		int k;
		for(int i=0;i<=100;i++){
			b = r.nextInt();
			a = Math.abs(b%100);
			k = a%2;
			System.out.println(a+" "+i);
			if(k == 0){
				System.out.println("正面");
			}else{
				System.out.println("反面");
			}
		}
	}
}