Slide 8 Example: top-down refinement Refinement = row 1: print (5-row) spaces, (2*row-1)stars row 2: print (5-row) spaces, (2*row-1)stars row 3: print (5-row) spaces, (2*row-1)stars, 大大大大大 row 4: print (5-row) spaces, (2* row-1)stars row 5: print (5-row) spaces, (2*row-1)stars, For each row(more exactly from row 1 to 5), always do Print 5-row spaces Print 2 *row-1 stars int rowi It's a loop: pseudo-code while (row<=5)t print 5-row spaces; pSlide 8 Example: top-down refinement Refinement: row 1: print (5-row) spaces, (2*row - 1) stars; row 2: print (5-row) spaces, (2*row - 1) stars; row 3: print (5-row) spaces, (2*row - 1) stars; row 4: print (5-row) spaces, (2*row - 1) stars; row 5: print (5-row) spaces, (2*row - 1) stars; For each ‘row’ (more exactly from row 1 to 5), always do Print 5-row spaces Print 2*row-1 stars It’s a loop: pseudo-code * * * * * * * * * * * * * * * * * * * * * * * * * int row; row=1; while(row<=5){ print 5-row spaces; print 2*row-1 stars; row=row+1; }