1-transformed charts: 1-1 pyramid pattern, 1-1-1

1-transformed charts: 1-1 pyramid pattern, 1-1-1

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1. Problem description:

5 layers of the pyramid, from top to bottom, number of stars 1, 3, 5, 7, 9, number of spaces 4, 3, 2, 1.

2. Problem Analysis:

1) determine the program framework:

Use for loop.

2) Search for the rule of space and star number:

Number of spaces 5-number of rows; Decrease by 1 in sequence.

The number of stars * 2-1; increments by 2.

3) number of printed Spaces

4) print the number of stars

5) complete procedures: