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C++ Institute CPA-21-02 Exam - Topic 1 Question 17 Discussion

What happens when you attempt to compile and run the following code?#include using namespace std;void set(struct person*);struct person{char name[25];int age;};int main(){struct person e = {"Steve", 30};set(&e);cout
D) None of these
A) Error: in prototype declaration unknown struct person
B) Error: in structure
C) It prints: Steve 31

C++ Institute CPA-21-02 Exam - Topic 1 Question 17 Discussion

Actual exam question for C++ Institute's CPA-21-02 exam
Question #: 17
Topic #: 1
[All CPA-21-02 Questions]

What happens when you attempt to compile and run the following code?

#include

using namespace std;

void set(struct person*);

struct person

{

char name[25];

int age;

};

int main()

{

struct person e = {"Steve", 30};

set(&e);

cout<< e.name << " " << e.age;

return 0;

}

void set(struct person *p)

{

p?>age = p?>age + 1;

}

Show Suggested Answer Hide Answer
Suggested Answer: D

by Raylene at May 30, 2024, 03:55 PM

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Judy
10 months ago
I'm surprised this even compiles at all!
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Katlyn
10 months ago
Wait, is `struct person` even defined before it's used?
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Katie
11 months ago
I think it should print "Steve 31" if the code was correct.
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Delbert
11 months ago
Totally agree, that `p?>age` is wrong!
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Alberto
11 months ago
Looks like a syntax error with the pointer syntax.
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Shawnee
11 months ago
I’m a bit confused; I thought the struct was defined correctly, but maybe there's an issue with the function prototype?
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Dorcas
12 months ago
I’m leaning towards option C because it seems like it should print "Steve 31" after incrementing the age.
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Darell
12 months ago
I remember practicing something similar, but I feel like there's a mistake with how the age is being accessed.
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Malissa
12 months ago
I think the code should compile, but I'm not sure about the pointer syntax in the set function.
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Ryann
12 months ago
I'm not sure about this one. The pointer usage in the `set()` function looks a bit tricky. I'll need to review my notes on pointers before attempting to answer.
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Kris
12 months ago
I think I've got it! The code should print "Steve 31" because the `set()` function increments the `age` field of the `person` object.
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Franchesca
12 months ago
Hmm, I'm a bit confused about the pointer usage in the `set()` function. I'll need to think through that carefully.
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Antonio
12 months ago
I'm pretty confident I can solve this. The key is understanding how pointers work in C++.
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Tran
1 year ago
Okay, let me break this down step-by-step. First, I'll check the structure declaration and how it's used in the `main()` function. Then I'll look at the `set()` function and how it modifies the `person` object.
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Jeannetta
1 year ago
Optimistic concurrency control is the way to go here. It's lightweight and efficient when conflicts are infrequent, which is the key detail in the question.
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Pamela
1 year ago
Wait, do they mean load testing will increase budget, or they're concerned about it? I'm a bit confused about the exact scenario here.
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Dorinda
1 year ago
Okay, I've got this. Time, core competencies, competitive advantage, customer response, and competitor response - those are all key factors to consider when assessing the feasibility of a strategy. I'm confident I can get this one right.
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Han
1 year ago
Wait, is this a trick question? I feel like I'm missing something obvious. I'm just gonna go with C and hope for the best. Pointers, man... they're like the Rubik's Cube of programming.
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Cherrie
1 year ago
C) It prints: Steve 31
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Chi
1 year ago
B) Error: in structure
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Elbert
1 year ago
A) Error: in prototype declaration unknown struct person
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Jannette
1 year ago
A classic pointer question! I bet the compiler is gonna scream at me for that weird-looking p->age syntax. I'm feeling confident and going with C, 'Steve 31'.
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Shawnda
1 year ago
User 3
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Kenneth
1 year ago
User 2
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Donte
1 year ago
User 1
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Ling
1 year ago
Haha, this reminds me of that time I spent hours debugging a pointer issue. Rookie mistake, I know. I'm going to go with C on this one, just to play it safe.
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Sabrina
1 year ago
I agree, C seems like the most likely outcome. It's always good to play it safe with these things.
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Anglea
1 year ago
Yeah, pointers can be tricky. C does seem like the safest option in this case.
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Bettina
1 year ago
I've made my fair share of pointer mistakes too. It happens to the best of us. C sounds like the safe bet here.
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Lisha
1 year ago
Hmm, I'm leaning towards B. Something seems off with the structure declaration. Maybe it's missing a semicolon or something. I'll have to double-check the syntax.
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Shawnda
1 year ago
Definitely A, the error is in the prototype declaration.
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Kizzy
1 year ago
Yeah, A makes sense. The struct person needs to be defined before it's used in the function.
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Danica
1 year ago
I agree, it looks like a prototype error. So, A is the correct answer.
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Dannie
1 year ago
I think it's A. The struct person is not defined before it's used.
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Tasia
1 year ago
Oh wow, this looks like a tricky one! I'm going to guess C, it prints 'Steve 31'. That pointer stuff is always a bit confusing, but I think the set function is modifying the age field directly.
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King
1 year ago
I agree, C seems like the correct answer. The set function is probably updating the age field directly.
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King
1 year ago
I think you're right, it should print 'Steve 31'. That pointer stuff can be tricky to understand.
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Micaela
1 year ago
But the code is trying to access a struct person before it's defined, so I still think it's A).
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Leota
2 years ago
I disagree, I believe the correct answer is C) It prints: Steve 31.
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Micaela
2 years ago
I think the answer is A) Error: in prototype declaration unknown struct person.
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