小弟刚学几天java 好多不懂的 请高手指点下。。求各种星星的输出:
A图:
*
**
***
****
*****
B图:
*
**
* *
* *
*****
C图:
*
***
*****
*******
*********
D图:
*
* *
* *
* *
*********
E图:
*
***
*****
***
**
*
*
F图:
*****
* *
* *
* *
*****
这几个图愁了我好几天了,,如果高手有耐心 希望加上详细的注解
另外我想问问,关于这些算来算去的星星 有什么用么?好繁琐啊,算起来好吃力,有什么强化,或者简便的办法吗?
A图:
*
**
***
****
*****
B图:
*
**
* *
* *
*****
C图:
*
***
*****
*******
*********
D图:
*
* *
* *
* *
*********
E图:
*
***
*****
***
**
*
*
F图:
*****
* *
* *
* *
*****
这几个图愁了我好几天了,,如果高手有耐心 希望加上详细的注解
另外我想问问,关于这些算来算去的星星 有什么用么?好繁琐啊,算起来好吃力,有什么强化,或者简便的办法吗?
你直接使用System.out.println("*");
B图:
*
**
* *
* *
*****
C图:
*
***
*****
*******
*********
D图:
*
* *
* *
* *
*********
E图:
*
***
*****
***
**
*
*
F图:
*****
* *
* *
* *
*****
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
for (int i = 0; i <= 4; i++) {
for (int j = 0; j <= i; j++) {
System.out.print("*");
}
System.out.println();
}
}}
package practice;public class B {
public static void main(String[] args) {
for (int i = 0; i <= 4; i++) {
if (i <= 1) {
for (int k = 0; k <= i; k++) {
System.out.print("*");
}
System.out.println();
} else if (i > 1 && i <= 3) {
for (int k = 0; k <= 2; k++) {
if (k == 1) {
System.out.print(" ");
} else {
System.out.print("*");
}
}
System.out.println(" ");
}else{
for(int k=0;k<=4;k++)
System.out.print("*");
}
}
}
}
package practice;public class C { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
for (int i = 1; i <= 5; i++) {
if (i <= 3) {
for (int k = 0; k <= 1; k++)
System.out.print(" ");
for (int j = 0; j < 2 * i - 1; j++)
System.out.print("*");
System.out.println();
} else {
for (int k = i; k <= 5; k++)
System.out.print(" ");
for (int j = 0; j < 2 * i - 1; j++)
System.out.print("*");
System.out.println();
}
}
}}
public class D { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
for (int i = 1; i <= 5; i++) {
if (i <= 2) {
for (int j = 0; j <= 1; j++)
System.out.print(" ");
for (int k = 1; k <= 2 * i - 1; k++) {
if ((k % 2) != 0)
System.out.print("*");
else
System.out.print(" ");
}
System.out.println();
} else if (i > 2 && i <= 4) {
for (int j = i; j <= 4; j++)
System.out.print(" ");
for (int k = 1; k <= 2 * i - 1; k++) {
if (k == 1 || k == 3)
System.out.print("*");
else
System.out.print(" ");
}
System.out.println();
}
}
for (int j = 0; j < 9; j++)
System.out.print("*");
}}package practice;public class E {
public static void main(String[] args) {
for (int i = 1; i <= 7; i++) {
if(i<=3){
for(int j=1;j<=2*i-1;j++){
System.out.print("*");
}
System.out.println();
}else if(i<=6){
for(int j=i;j<=6;j++)
System.out.print("*");
System.out.println();
}else{
System.out.print("*");
}
}
}
}
package practice;public class F { /**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
for (int i = 3; i <= 7; i++) {
if (i == 3 || i == 7) {
for (int j = 1; j <= 5; j++) {
System.out.print("*");
}
System.out.println();
} else {
for (int j = i - 2; j <= i; j++) {
if(i%2==0){
if (j % 2 == 0)
System.out.print("*");
else
System.out.print(" ");
}else{
if (j % 2 != 0)
System.out.print("*");
else
System.out.print(" ");
}
}
System.out.println();
}
}
}
应该有更简单的方法 欢迎大家批评指正
{
public static void main(String[] args)
{
for (int x = 1 ; x<=5 ; x++ )//定义你要打印星星的行数
{
for (int y = 1 ; y<=x ; y++ )
{ //这个定义每列要打印的星星数,关键就是在这个y<=x上,你好好琢磨下。
System.out.print("*");
}
System.out.println(); //这个是用来打印换行的
}
}
}
代码直接打出来的,没有去跑,可能有点小问题,估计可能也就是中文状态下的标点符号、
public class Test
{
public static void main(String[] args)
{
int[][] a = new int[][]{{1,0,0,0,0,},{1,1,0,0,0},{1,1,1,0,0},{1,1,1,1,0},{1,1,1,1,1,1}};
int[][] b = new int[][]{{1,0,0,0,0,},{1,1,0,0,0},{1,0,1,0,0},{1,0,1,0,0},{1,1,1,1,1,1}};
int[][] c = new int[][]{{0,0,1,0,0,0,0,0,0},{0,0,1,1,1,0,0,0,0},{0,0,1,1,1,1,0,0,0},{0,1,1,1,1,1,1,1,0},{1,1,1,1,1,1,1,1,1}};
int[][] d = new int[][]{{0,0,1,0,0,0,0,0,0},{0,0,1,0,1,0,0,0,0},{0,0,1,0,1,0,0,0,0},{0,1,0,1,0,0,0,0,0},{1,1,1,1,1,1,1,1,1}};
int[][] e = new int[][]{{1,0,0,0,0,},{1,1,1,0,0},{1,1,1,1,1},{1,1,1,0,0},{1,1,0,0,0,0},{1,0,0,0,0,0},{1,0,0,0,0,0}};
int[][] f = new int[][]{{1,1,1,1,1,},{1,0,1,0,0},{1,0,1,0,0},{1,0,1,0,0},{1,1,1,1,1,1}};
System.out.println("-----------------------------------------------");
System.out.println("A图是:");
Test.printxx(a);
System.out.println("-----------------------------------------------");
System.out.println("B图是:");
Test.printxx(b);
System.out.println("-----------------------------------------------");
System.out.println("C图是:");
Test.printxx(c);
System.out.println("-----------------------------------------------");
System.out.println("D图是:");
Test.printxx(d);
System.out.println("-----------------------------------------------");
System.out.println("E图是:");
Test.printxx(e);
System.out.println("-----------------------------------------------");
System.out.println("F图是:");
Test.printxx(f);
}
public static void printxx(int[][] n)
{
int[][] x=n;
for (int i=0;i<5;i++)
{
for(int j=0;j<5;j++)
{
if(x[i][j]==1)
{
System.out.print("*");
}
else
{
System.out.print(" ");
}
}
System.out.println();
}
}
}
public class Test
{
public static void main(String[] args)
{
int[][] a = new int[][]{{1,0,0,0,0,},{1,1,0,0,0},{1,1,1,0,0},{1,1,1,1,0},{1,1,1,1,1,1}};
int[][] b = new int[][]{{1,0,0,0,0,},{1,1,0,0,0},{1,0,1,0,0},{1,0,1,0,0},{1,1,1,1,1,1}};
int[][] c = new int[][]{{0,0,1,0,0,0,0,0,0},{0,0,1,1,1,0,0,0,0},{0,0,1,1,1,1,0,0,0},{0,1,1,1,1,1,1,1,0},{1,1,1,1,1,1,1,1,1}};
int[][] d = new int[][]{{0,0,1,0,0,0,0,0,0},{0,0,1,0,1,0,0,0,0},{0,0,1,0,1,0,0,0,0},{0,1,0,1,0,0,0,0,0},{1,1,1,1,1,1,1,1,1}};
int[][] e = new int[][]{{1,0,0,0,0,},{1,1,1,0,0},{1,1,1,1,1},{1,1,1,0,0},{1,1,0,0,0,0},{1,0,0,0,0,0},{1,0,0,0,0,0}};
int[][] f = new int[][]{{1,1,1,1,1,},{1,0,1,0,0},{1,0,1,0,0},{1,0,1,0,0},{1,1,1,1,1,1}};
System.out.println("-----------------------------------------------");
System.out.println("A图是:");
Test.printxx(a);
System.out.println("-----------------------------------------------");
System.out.println("B图是:");
Test.printxx(b);
System.out.println("-----------------------------------------------");
System.out.println("C图是:");
Test.printxx(c);
System.out.println("-----------------------------------------------");
System.out.println("D图是:");
Test.printxx(d);
System.out.println("-----------------------------------------------");
System.out.println("E图是:");
Test.printxx(e);
System.out.println("-----------------------------------------------");
System.out.println("F图是:");
Test.printxx(f);
}
public static void printxx(int[][] n)
{
int[][] x=n;
int xl=x.length;
int yl=x[0].length;
for (int i=0;i<xl;i++)
{
for(int j=0;j<yl;j++)
{
if(x[i][j]==1)
{
System.out.print("*");
}
else
{
System.out.print(" ");
}
}
System.out.println();
}
}
}
第0行打印第0列的"*"
第1行打印第0/1列的"*"
第2行打印第0/1/2列的"*"
...
第N行打印第i列的"*",0 < = i < = N结果就是:int N = 4;
for(int i = 0; i < N; i++){//表示行
for(int j = 0; j < N; j++){//表示列
System.out.println("*");
}
System.out.println("\n");//换行
}
for(int i = 0; i <= N; i++){//表示行
for(int j = 0; j <= i; j++){//表示列
System.out.println("*");
}
System.out.println("\n");//换行
}
//勉强写了一个,不知是否是你想要的。图形没有粘贴好,很痛苦。
public class Diamod {
public static int N = 5;
public static void outPut(char c){
System.out.println(c+"图:");
}
public static void mapA(){
outPut('A');
for (int i = 0; i < N; i++) {
for (int j = 0; j < i + 1; j++) {
System.out.print('*');
}
System.out.println();
}
}
public static void mapB(){
outPut('B');
for (int i = 0; i < N; i++) {
for (int j = 0; j <= i ; j++) {
if(i==2&&j==1||((j==1||j==2)&&i==3))
System.out.print(" ");
else
System.out.print('*');
}
System.out.println();
}
}
public static void mapC(){
outPut('C');
for (int i = 0; i < N; i++) {
for (int j = 0; j < N - i - 1; j++) {
System.out.print(" ");
}
for (int j = 0; j < 2 * i + 1; j++) {
System.out.print('*');
}
System.out.println();
}
}
public static void mapD(){
outPut('D');
char[][] arr = new char[N][2*N-1];
for (int i = 0; i < N; i++) {
for (int j = 0; j < 2 * N - 1 ; j++) {
arr[i][j] = ' ';
if(i==N-1||i+j==4||j-i==4)
arr[i][j] = '*';
}
}
for (int i = 0; i < N; i++) {
for (int j = 0; j < 2 * N - 1; j++) {
System.out.print(arr[i][j]);
}
System.out.println();
}
}
public static void mapE(){
outPut('E');
for(int i=0;i<N;i++){
for(int j=0;j<N-2*Math.abs(N/2-i);j++)
System.out.print('*');
System.out.println();
}
}
public static void mapF(){
outPut('F');
for (int i = 0; i < N; i++) {
for (int j = 0; j < N ; j++) {
if(i == 0 || i == N-1)
System.out.print('*');
else if(j == 0 || j == 2)
System.out.print('*');
if(j == 1 && i != 0 && i != N-1)
System.out.print(" ");
}
System.out.println();
}
}
public static void main(String[] args) {
mapA();
mapB();
mapC();
mapD();
mapE();
mapF();
}
}
运行结果:
A图:
*
**
***
****
*****
B图:
*
**
* *
* *
*****
C图:
*
***
*****
*******
*********
D图:
*
* *
* *
* *
*********
E图:
*
***
*****
***
*
F图:
*****
* *
* *
* *
*****