Question

急！！帮我写一下JAVA小程序，谢谢，

4. 编写程序，输出以下数据：
N 10*N 100*N 1000*N
1 10 100 1000
2 20 200 2000
3 30 300 3000
4 40 400 4000
5 50 500 5000
要求使用for循环。

Answer 1

public static void main(String[] args) {

StringBuilder buffer = new StringBuilder();
// title
for (int i = 1; i <= 5; i++) {
buffer.append(i + "\t" + 10*i + "\t" + 100*i + "\t" + 1000*i + "\n");
}
System.out.println(buffer.toString());
}

Answer 2

// 比较简单，呵呵，直接写了
public class Test {
public static void print(int line) {
StringBuilder buffer = new StringBuilder();
// title
buffer.append("N\t10*N\t100*N\t1000*N").append("\n");
for (int i = 0; i < line; i++) {
buffer.append(i).append("\t").append(10*i).append("\t")
.append(100*i).append("\t").append(1000*i).append("\n");
}
System.out.println(buffer.toString());
}

public static void main(String[] args) {
print(5);
}
}

---------------------------------------------------------------
简单点直接这样写：
public class Test {
public static void main(String[] args) {
System.out.println ("N\t10*N\t100*N\t1000*N\n");
for (int i = 0; i < 5; i++) {
System.out.print(i);
System.out.print("\t");
System.out.print(10*i);
System.out.print("\t");
System.out.print(100*i);
System.out.print("\t")
System.out.println(1000*i)
}
}

Answer 3

不需要用户输入？只要这五行？

Answer 4

int num=5;
for(int i=1;i<=num;i++){
System.out.println(i+"\t"+(i*10)+"\t"+(i*100)+"\t"+(i*1000));
}

Answer 5

package test;

import java.util.Scanner;

public class Test06 {
public static void main(String[] args) {
System.out.println("请输入要打印的行数：");
Scanner sc = new Scanner(System.in);
int m = sc.nextInt();
System.out.println("N" + " " + "10*N" + " " +"100*N" + " " + "1000*N");
print(m);
}
public static void print(int m) {
for(int i=1; i<=m;i++) {
System.out.println(i + " " + 10*i + " " +100*i + " " + 1000*i);
}
}
}

Answer 6

public class test{
    public static void main(String args[]){
    System.out.println("N \t 10*N \t 100*N \t 1000*N");
    for(int i=1; i<=5; i++){
        System.out.print(i+"\t");
        System.out.print(i*10+"\t");
        System.out.print(i*100+"\t");
        System.out.print(i*1000+"\t");
        System.out.println("");
    }
   }
}