Question

用JAVA的for循环语句 输出以下图形

*
**
***
****
*****
****
***
**
*

Answer 1

public class tuxing {
public static void main(String args[]){
for(int i=1;i<=9;i++)
if(i<=5)
{
for(int j=1;j<=i;j++)
System.out.print("*");
System.out.println("");
}
else
{
for(int j=10-i;j>=1;j--)
System.out.print("*");
System.out.println("");
}
}

}

Answer 2

for(i=1,i<=5,i++)
{
for(n=i,n<=i,n++)
printf("*");
printf("\n");
}
for(i=4,i>0,i--)
{
for(n=i,n>0,n--)
printf("*");
printf("\n");
}
这是C 的写法 或许对你有帮助

Answer 3

public class Test {
public static void main(String[] args) {
int le = 5;
for (int i = 1; i <= le; i++) {
for (int j = 1; j <= i; j++) {
System.out.print("*");
}
System.out.println("");
}
for (int i = 1; i <= le; i++) {
for (int j = le-1; j >= i; j--) {
System.out.print("*");
}
System.out.println("");
}
}
}

Answer 4

public static void main(String[] args){
String stars = "";
int len;
for(len = 1 ; len <= 5 ; len++){
stars += "*";
System.out.println(stars);
}

for( len -= 1; len >0; len--){
stars = stars.substring(0, len-1);
System.out.println(stars);
}
}

Answer 5

无聊