The pseudocode below is an example of which control structure?

Question

BlackTom AI · Accepted Answer

Sequence means executing statements one after another; the pseudocode performs four straight statements: A ← 5, B ← 2, C ← A * B, Print C.

1. Relevant knowledge points and concepts
- Control structures: sequence (straight-line execution), selection (branching: if/then/else), and repetition/looping (for, while loops).
- Sequence executes each statement in order with no branching or repetition.
- Selection requires a conditional that can change the path of execution.
- Loop/repetition repeats a block while a condition is true or for a set number of iterations.

2. Complete reasoning process step by step
- Read the pseudocode inside Begin/End:
  1) A ← 5
  2) B ← 2
  3) C ← A * B
  4) Print C
- Each statement is executed in the order written, with no conditionals and no loop constructs.

3. Calculations and intermediate steps
- After step 1: A = 5
- After step 2: B = 2
- Step 3 computes C = A * B = 5 * 2 = 10
- Step 4 prints the value 10

4. Why the correct answer is correct
- The code shows a simple, linear flow: assign, assign, compute, output. That is the definition of the sequence control structure — a straight-line series of statements executed one after another. There is no conditional branching and no repetition, so sequence is the appropriate classification.

5. Why the other options are incorrect
- b. Loop: would require a repeating construct (for, while, repeat) or a condition causing repeated execution — absent here.
- c. Selection: would require an if/then/else or case/switch to choose different paths — absent here.
- d. Repetition: synonymous with loop; again requires repeated execution based on a condition — not present.

6. Conclusion
- The pseudocode is an example of the sequence control structure. Final answer: a. Sequence.

The pseudocode below is an example of which control structure?单项选择题

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