Which of the following sequences of three-address instructions can be used to…
2018
Which of the following sequences of three-address instructions can be used to evaluate Y = (A-B)/(C+D*E)?
Answer: D. SUB Y, A, B MPY T, D, E ADD T, T, C DIV Y, Y, T — First, compute the numerator A minus B and store it in a temporary variable. Next, calculate D multiplied by E, then add C to that result for the denominator.…
- A.
SUB Y, A, B
MPY T, D, E
ADD T, T, C
DIV T, Y, T - B.
SUB Y, A, B
MPY T, D, E
ADD T, T, C
DIV Y, T, T - C.
SUB Y, A, B
ADD T, T, C
MPY T, D, E
DIV Y, Y, T - D.
SUB Y, A, B
MPY T, D, E
ADD T, T, C
DIV Y, Y, T
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Correct answer: D
First, compute the numerator A minus B and store it in a temporary variable. Next, calculate D multiplied by E, then add C to that result for the denominator. Finally, divide the numerator value by the denominator value and assign it to Y.