Pemodelan untuk Komputasi: Nested Repetition dan Contoh Soal ( Bahasa Inggris )
Control Structures
Basically, different control structures can be combined in order to create a complex program, which is used to solve difficult problems :
- Nested If
- Combination of conditional & repetition
- Nested Repetition
Nested Repetition: Pattern 1
Wombat Needs to Write this pattern :
@@@@@
@@@@@
@@@@@
@@@@@
@@@@@
To make the pattern, Wombat needs to:
- Write “@” symbol five times in a row
- Do step A five times to make five rows.
Algorithms for Pattern 1
First of all, write five @ symbols in a row :
Then, write five @ symbols in five rows :
Then, combine the first step with second step that becomes right below :
Pattern 2
How about this one ?
@
@@
@@@
@@@@
@@@@@
To make the pattern, Wombat needs to:
- Write “@” symbol i times in a row, where i = row number
- Do step A five times to make five rows.
Algorithms for Pattern 2
First, write @ symbols i times in a row, where i = row number:
Second, write five @ symbols in five rows:
Pattern 3
Wombat wants to write n rows. In row number i, Wombat will write: Round i: number from 1 to i. Example (n = 5)
Round 1: 1
Round 2: 1 2
Round 3: 1 2 3
Round 4: 1 2 3 4
Round 5: 1 2 3 4 5
To make the pattern, Wombat needs to:
- Write “Round i: 1 to i" in each row, where i is row number.
- Do step 1 n times to make n rows.
Algorithms for Pattern 3
First, write "Round i: 1 to i" in each row, where i is row number.
Second, do step A n times to make n rows.
Exercise 1
Wombat wants to write this pattern: (example if n = 5)
Round 1: 1 1 1 1 1
Round 2: 2 2 2 2 2
Round 3: 3 3 3 3 3
Round 4: 4 4 4 4 4
Round 5: 5 5 5 5 5
Exercise 2
Wombat wants to write this pattern. Example if n = 5:
Round 1: 5 5 5 5 5
Round 2: 4 4 4 4 4
Round 3: 3 3 3 3 3
Round 4: 2 2 2 2 2
Round 5: 1 1 1 1 1
Exercise 3
Wombat wants to write this pattern: (example if n = 5)
Round 1: 5 5 5 5 5
Round 2: 4 4 4 4
Round 3: 3 3 3
Round 4: 2 2
Round 5: 1
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