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Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gel t1 G, x: t1e2: t2 Glet x el in e2 t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Geq0e bool Gel bool Ge2: t Ge3: t Gif el then e2 else e3: t Which of the following is the correct typing rule for a conditional expression (if e1 then e2 else e3) according to the image? Ge1: int, Ge2: int, G - e3: int Ge1: bool, Ge2: t, Ge3: t Ge1: int, Ge2: bool, G - e3: bool Ge1: bool, Ge2: bool, G - e3: int Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gelt1 G,x: t1e2: t2 Glet x el in e2: t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Gel bool Ge2t Ge3: t Geq0 e bool Gif el then e2 else e3: t Using the typing rules above, determine if the following expressions are well-typed:

Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gel t1 G, x: t1e2: t2 Glet x el in e2 t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Geq0e bool Gel bool Ge2: t Ge3: t Gif el then e2 else e3: t Which of the following is the correct typing rule for a conditional expression (if e1 then e2 else e3) according to the image? Ge1: int, Ge2: int, G - e3: int Ge1: bool, Ge2: t, Ge3: t Ge1: int, Ge2: bool, G - e3: bool Ge1: bool, Ge2: bool, G - e3: int Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gelt1 G,x: t1e2: t2 Glet x el in e2: t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Gel bool Ge2t Ge3: t Geq0 e bool Gif el then e2 else e3: t Using the typing rules above, determine if the following expressions are well-typed:

Programming Logic & Design Comprehensive
Programming Logic & Design Comprehensive
9th Edition
ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter2: Elements Of High-quality Programs
Section: Chapter Questions
Problem 5RQ
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Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gel t1 G, x: t1e2: t2 Glet x el in e2 t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Geq0e bool Gel bool Ge2: t Ge3: t Gif el then e2 else e3: t Which of the following is the correct typing rule for a conditional expression (if e1 then e2 else e3) according to the image? Ge1: int, Ge2: int, G - e3: int Ge1: bool, Ge2: t, Ge3: t Ge1: int, Ge2: bool, G - e3: bool Ge1: bool, Ge2: bool, G - e3: int
Transcribed Image Text:Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gel t1 G, x: t1e2: t2 Glet x el in e2 t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Geq0e bool Gel bool Ge2: t Ge3: t Gif el then e2 else e3: t Which of the following is the correct typing rule for a conditional expression (if e1 then e2 else e3) according to the image? Ge1: int, Ge2: int, G - e3: int Ge1: bool, Ge2: t, Ge3: t Ge1: int, Ge2: bool, G - e3: bool Ge1: bool, Ge2: bool, G - e3: int
Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gelt1 G,x: t1e2: t2 Glet x el in e2: t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Gel bool Ge2t Ge3: t Geq0 e bool Gif el then e2 else e3: t Using the typing rules above, determine if the following expressions are well-typed:
Transcribed Image Text:Gx: G(x) Gtrue bool Gfalse: bool Gn: int Gelt1 G,x: t1e2: t2 Glet x el in e2: t2 Gel bool Ge2 bool Gel and e2: bool Ge: int Gel bool Ge2t Ge3: t Geq0 e bool Gif el then e2 else e3: t Using the typing rules above, determine if the following expressions are well-typed:
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