Diamond嵌套在Java循环 [英] Diamond with nested for loop in Java

问题描述

以下是我的代码：

$ b $公共类钻石{

public static void main（String [] args）{

int size = 9; （int k = size; k> = i; k - = 2）{
for（int i = 1; i <= size; i + = 2）
System.out.print（）;

（int j = 1; j <= i; j ++）{
System.out.print（*）;
}
System.out.println（）; （int k = 1; k< b $ b）//结束循环

（int i = 1; i< = size; i + = 2） = i; k + = 2）{
System.out.print（）;

for（int j = size; j> = i; j--）{
System.out.print（*）;
}
System.out.println（）;
} // end loop
}

}

<

如何调整循环的第二个以7个星号和2个空格开始输出

感谢您的帮助！

解决方案

for循环remove =标记，只需使用<
例如 for（int i = 1; i

完整代码

  int size = 9; （int k = size; k> = i; k  -  = 2）{
 
 
（int i = 1; i< size; i + = 2） b $ b System.out.print（）; 
 
（int j = 1; j <= i; j ++）{
 System.out.print（*）; 
} 
 System.out.println（）; （int k = 1; k< b $ b）//结束循环
 
（int i = 1; i< = size; i + = 2） = i; k + = 2）{
 System.out.print（）; 
 
 for（int j = size; j> = i; j--）{
 System.out.print（*）; 
} 
 System.out.println（）; 
} // end loop 
  

I am trying to display a diamond of asterisks using nested for loops.

Here is my code so far:

    public class Diamond {

        public static void main(String[] args) {

            int size = 9;

            for (int i = 1; i <= size; i += 2) {
                for (int k = size; k >= i; k -= 2) {
                    System.out.print(" ");
                }
                for (int j = 1; j <= i; j++) {
                    System.out.print("*");
                }
                System.out.println();
            }// end loop

            for (int i = 1; i <= size; i += 2) {
               for (int k = 1; k <= i; k += 2) {
                    System.out.print(" ");
                }
                for (int j = size; j >= i; j--) {
                    System.out.print("*");
                }
                System.out.println();
            }// end loop
        }

    }

This is close but I'm printing the line of 9 asterisks twice.

How can I adjust the second for loop to start the output at 7 asterisks and 2 spaces??

Thanks for the help!

解决方案

In your first for loop remove = mark and just use < e.g. for (int i = 1; i < size; i += 2)

Full code

    int size = 9;

    for (int i = 1; i < size; i += 2) {
        for (int k = size; k >= i; k -= 2) {
            System.out.print(" ");
        }
        for (int j = 1; j <= i; j++) {
            System.out.print("*");
        }
        System.out.println();
    }// end loop

    for (int i = 1; i <= size; i += 2) {
        for (int k = 1; k <= i; k += 2) {
            System.out.print(" ");
        }
        for (int j = size; j >= i; j--) {
            System.out.print("*");
        }
        System.out.println();
    }// end loop

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