class chengfa
{
public static void main(String[] args)
{
int i,j;
for(i=1;i<=9;i++)
for(j=1;j<=i;j++)
{
System.out.print(j+"x"+i+"="+i*j+" ");
if(j==i){System.out.println();
}
}}}
这个是下三角的 如何编写上三角呢
使ç¨ä¸¤å±for循ç¯å³å¯ç¼åä¹ä¹ä¹æ³è¡¨ï¼ä»¥ä¸æ¯ä¸¤ä¸ªä¾å代ç ï¼å
æ¬ä¸ä¸è§åä¸ä¸è§
ä¸ä¸è§ï¼
class Demo
{
public static void main(String[] args)
{
System.out.println("ä¹ä¹ä¹æ³è¡¨ï¼ä¸ä¸è§ï¼ï¼");
int x,y;
for(x = 1;x <= 9; x++)
{
for(y = 9;y >= x; y--)
{
System.out.print((9-y+1)+"*"+x+"="+x*(9-y+1)+"\t");
}
System.out.println();
}
}
}
ä¸ä¸è§ï¼
class Demo
{
public static void main(String[] args)
{
System.out.println("ä¹ä¹ä¹æ³è¡¨ï¼ä¸ä¸è§ï¼ï¼");
int x,y;
for(x = 0;x <= 9; x++)
{
for(y = 1;y <= x; y++)
{
System.out.print(y+"*"+x+"="+x*y+"\t");
}
System.out.println();
}
}
}
ä¸ä¸è§ï¼
class Demo
{
public static void main(String[] args)
{
System.out.println("ä¹ä¹ä¹æ³è¡¨ï¼ä¸ä¸è§ï¼ï¼");
int x,y;
for(x = 1;x <= 9; x++)
{
for(y = 9;y >= x; y--)
{
System.out.print((9-y+1)+"*"+x+"="+x*(9-y+1)+"\t");
}
System.out.println();
}
}
}
ä¸ä¸è§ï¼
class Demo
{
public static void main(String[] args)
{
System.out.println("ä¹ä¹ä¹æ³è¡¨ï¼ä¸ä¸è§ï¼ï¼");
int x,y;
for(x = 0;x <= 9; x++)
{
for(y = 1;y <= x; y++)
{
System.out.print(y+"*"+x+"="+x*y+"\t");
}
System.out.println();
}
}
}
温馨提示：答案为网友推荐，仅供参考
第1个回答 2019-11-15
public class Admin {
public static void main(String[] aa) {
getChengfa();
}
private static void getChengfa() {
for (int i = 1; i <= 9; i++) {
for (int j = i; j <= 9; j++) {
System.out.print(i + " * " + j + " = " + i * j + " ");
}
System.out.println();
}
}
}
2 * 2 = 4 2 * 3 = 6 2 * 4 = 8 2 * 5 = 10 2 * 6 = 12 2 * 7 = 14 2 * 8 = 16 2 * 9 = 18
3 * 3 = 9 3 * 4 = 12 3 * 5 = 15 3 * 6 = 18 3 * 7 = 21 3 * 8 = 24 3 * 9 = 27
4 * 4 = 16 4 * 5 = 20 4 * 6 = 24 4 * 7 = 28 4 * 8 = 32 4 * 9 = 36
5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45
6 * 6 = 36 6 * 7 = 42 6 * 8 = 48 6 * 9 = 54
7 * 7 = 49 7 * 8 = 56 7 * 9 = 63
8 * 8 = 64 8 * 9 = 72
9 * 9 = 81
public static void main(String[] aa) {
getChengfa();
}
private static void getChengfa() {
for (int i = 1; i <= 9; i++) {
for (int j = i; j <= 9; j++) {
System.out.print(i + " * " + j + " = " + i * j + " ");
}
System.out.println();
}
}
}
结果：
1 * 1 = 1 1 * 2 = 2 1 * 3 = 3 1 * 4 = 4 1 * 5 = 5 1 * 6 = 6 1 * 7 = 7 1 * 8 = 8 1 * 9 = 92 * 2 = 4 2 * 3 = 6 2 * 4 = 8 2 * 5 = 10 2 * 6 = 12 2 * 7 = 14 2 * 8 = 16 2 * 9 = 18
3 * 3 = 9 3 * 4 = 12 3 * 5 = 15 3 * 6 = 18 3 * 7 = 21 3 * 8 = 24 3 * 9 = 27
4 * 4 = 16 4 * 5 = 20 4 * 6 = 24 4 * 7 = 28 4 * 8 = 32 4 * 9 = 36
5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45
6 * 6 = 36 6 * 7 = 42 6 * 8 = 48 6 * 9 = 54
7 * 7 = 49 7 * 8 = 56 7 * 9 = 63
8 * 8 = 64 8 * 9 = 72
9 * 9 = 81
第2个回答 2008-05-22
class chengfa {
public static void main(String[] args) {
int i, j;
for (i = 1; i <= 9; i++) {
for (j=1; j <= 9; j++) {
if (j >= 10 - i) {
System.out.print((10-j)+"x"+i+"="+i*(10-j)+"\t");
}else{
System.out.print(" ");
}
}System.out.println();
}
}
}
这样？本回答被网友采纳
public static void main(String[] args) {
int i, j;
for (i = 1; i <= 9; i++) {
for (j=1; j <= 9; j++) {
if (j >= 10 - i) {
System.out.print((10-j)+"x"+i+"="+i*(10-j)+"\t");
}else{
System.out.print(" ");
}
}System.out.println();
}
}
}
这样？本回答被网友采纳
第3个回答 2008-05-22
楼上的算法从代码看格式是不正确的，不是上三角
class chengfa {
public static void main(String[] args) {
{
int i,j;
for(i=9;i>=1;i--)
{
for(j=1;j<=i;j++)
{
System.out.println(i+"*"+j+"="+i*j+" ");//引号内一个空格
}
System.out.println();
int k=9-i+1;
while(k!=0)
{
System.out.println(" "); //7个空格保证格式的正确，最起码从我的电脑看是这样,可根据显示出来的格式调整空格数。
k--;
}
}
};
class chengfa {
public static void main(String[] args) {
{
int i,j;
for(i=9;i>=1;i--)
{
for(j=1;j<=i;j++)
{
System.out.println(i+"*"+j+"="+i*j+" ");//引号内一个空格
}
System.out.println();
int k=9-i+1;
while(k!=0)
{
System.out.println(" "); //7个空格保证格式的正确，最起码从我的电脑看是这样,可根据显示出来的格式调整空格数。
k--;
}
}
};
第4个回答 2008-05-23
public class Test
{ public static void main(String[] args)
{ for(int i=1;i<=9;i++)
{ for(int j=1;j<=i;j++)
{ System.out.print(i+"*"+j+"="+i*j+" ");
}
System.out.println();
}
}
}
结果是:
1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
{ public static void main(String[] args)
{ for(int i=1;i<=9;i++)
{ for(int j=1;j<=i;j++)
{ System.out.print(i+"*"+j+"="+i*j+" ");
}
System.out.println();
}
}
}
结果是:
1*1=1
2*1=2 2*2=4
3*1=3 3*2=6 3*3=9
4*1=4 4*2=8 4*3=12 4*4=16
5*1=5 5*2=10 5*3=15 5*4=20 5*5=25
6*1=6 6*2=12 6*3=18 6*4=24 6*5=30 6*6=36
7*1=7 7*2=14 7*3=21 7*4=28 7*5=35 7*6=42 7*7=49
8*1=8 8*2=16 8*3=24 8*4=32 8*5=40 8*6=48 8*7=56 8*8=64
9*1=9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81
