C语言程序设计教程（第三版）课后习题7.1 （Java代码）

import java.util.Scanner;

public class Main {

        public static void prime(int N){

                for(int i=2;i<=N;i++){

                        for(int j =2;j<=i;j++){

                                if(i%j==0&&i!=j)

                                       break;

                                if(i==j)

                                        System.out.println(i);

                        }

                }

        }

        public static void main(String[] arg){

                Scanner sc = new Scanner(System.in);

                int N = sc.nextInt();

                prime(N);

        }

}