C++ Institute CPP Exam - Topic 1 Question 85 Discussion

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

Question #: 85
Topic #: 1

Which changes introduced independently will allow the code to compile and display ''one'' ''eight'' ''nine'' ''ten''? Choose all that apply.

#include

using namespace std;

class A {

int a;

public:

A(int a):a(a){}

int getA() const { return a;}

/* Insert Code Here 1 */

};

/* Insert Code Here 2 */

int main(){

int t[] ={ 3, 4, 2, 1, 6, 5, 7, 9, 8, 10 };

string s[] = {"three", "four", "two", "one", "six","five", "seven", "nine","eight","ten"};

multimap m;/* Replace Code Here 3 */

for(int i=0; i<10; i++) {

m.insert(pair(A(t[i]),s[i]));

}

m.erase(m.lower_bound(2),m.upper_bound(7));

multimap::iterator i=m.begin();/* Replace Code Here 4 */

for( ; i!= m.end(); i++) {

cout<second<<" ";

}

cout<

return 0;

}

Aoperator int() const { return a;} inserted at Place 1

Bbool operator < (const A & b) const { return a<b.a;} inserted at Place 1

Cbool operator < (const A & b) const { return b.a

Dstruct R { bool operator ()(const A & a, const A & b) { return a.getA()<b.getA();} }; inserted at Place 2
replacing line marked 3 with multimap<A, string, R> m;
replacong line marked 4 with multimap<A, string, R>::iterator i=m.begin();

Show Suggested Answer

Suggested Answer: C

by Vallie at May 19, 2024, 06:58 AM

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Dante

5 months ago

I agree, D makes sense for the multimap.

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Elke

5 months ago

Surprised that we need a struct for the comparator!

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Tien

6 months ago

Wait, C seems off. Why would we reverse the comparison?

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Elenore

6 months ago

I think B is the right choice too.

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Virgie

6 months ago

A and D are definitely needed!

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Pamella

6 months ago

I think option C is incorrect because it reverses the comparison, which doesn't make sense for sorting. I’m leaning towards B and D being the right answers.

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Tammi

7 months ago

I feel like option D is a good choice since it defines a functor for the multimap, but I'm a bit confused about how it interacts with the other options.

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Yolande

7 months ago

I remember practicing a similar question where we had to define comparison operators for a class. I think option A might be useful too, but I can't recall if it's necessary here.

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Karan

7 months ago

I think option B is definitely needed for the comparison to work in the multimap, but I'm not sure about the others.

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Brianne

7 months ago

This is a good test of our understanding of C++ classes, operator overloading, and the multimap container. I'll need to work through this step-by-step to make sure I get the right solution.

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Ming

7 months ago

Okay, I think I've got a handle on this. The key is to implement a custom comparison function for the A class so that the multimap can sort the elements properly.

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Theodora

7 months ago

Hmm, I'm a bit confused about the different options. I'll need to think through each one and see how it would impact the code's behavior.

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Merilyn

7 months ago

This looks like a tricky question. I'll need to carefully read through the code and understand the problem before attempting to solve it.

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Providencia

7 months ago

I'm feeling pretty confident about this one. I think option D is the way to go - it provides the custom comparison function and updates the multimap declaration and iterator accordingly.

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Scot

7 months ago

Hmm, I'm a bit confused on this one. I know ABC includes more overhead costs, but I'm not sure how that impacts the reported profits.

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Elin

7 months ago

Okay, let's see. The application works directly on the servers, so the issue must be with the LTM configuration. I'll need to think through the options carefully.

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Rueben

7 months ago

I remember learning about weekly distribution in class, but I'm not totally confident I understand all the details. I'll have to read the options closely.

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Lashonda

1 year ago

I'm going to go with options B and D. The custom comparator seems like a cleaner solution than overloading the less-than operator directly on the A class.

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