C++ Institute Exam CPP Topic 2 Question 73 Discussion

Actual exam question for C++ Institute's CPP exam

Question #: 73
Topic #: 2

[All CPP Questions]

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

#include

using namespace std;

void myfunction(int i) {

cout << " " << i;

}

bool classifier(int v) {

return v%2==0;

}

int main() {

int t[] = { 1, 5, 2, 5, 2, 4, 4, 3, 3, 1 };

vector v1(t, t+10);

set s1(t, t+10);

replace(v1.begin(), v1.end(),classifier, 10);

for_each(v1.begin(), v1.end(), myfunction);

return 0;

}

Program outputs:

A1 5 10 5 10 10 10 3 3 1

B1 5 2 5 2 4 4 3 3 1

Ccompilation error

D10 10 2 10 2 4 4 10 10 10

Show Suggested Answer

Suggested Answer: C

by Johnetta at Oct 16, 2023, 09:48 AM

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Nell

21 days ago

Whoa, hold on a second! If the replace function is using a predicate, then the answer should be D. The predicate function checks if the number is even, and the replace function replaces those even numbers with 10. So the output will be 10 5 2 5 2 4 4 3 3 10.

upvoted 0 times

Juan

2 days ago

I think the answer is A.

upvoted 0 times

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Man

27 days ago

Hold on, I think there's a catch here. The replace function takes a predicate function as its third argument, not a value to replace with. So this code won't even compile. The answer is C, compilation error.

upvoted 0 times

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Ozell

1 months ago

I'm pretty sure the answer is B. The replace function replaces the even numbers with 10, but it doesn't preserve the original order of the elements. So the output should be 1 10 2 5 2 4 4 3 3 10.

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