Discuss C++ Institute CPA-21-02 Exam Topic 3 Question 49

What is the output of the program given below?

#include

using namespace std;

int main (int argc, const char * argv[])

{

int i=10;

{

int i=0;

cout<

}

{

i=5;

cout << i;

}

cout<

return 0;

}

C055

DNone of these

A1010

B101010

Suggested Answer: C

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27 comments · newest first

Herman 3 months ago

I agree with Lou, but I feel unsure about the scope rules.

Theola 3 months ago

No, it should print 0, then 5, then 10.

Lou 3 months ago

I think it prints 5, then 5, then 5.

Tiera 3 months ago

Confusing question!

Isidra 4 months ago

The outer 'i' doesn't get printed until the end!

Carlota 5 months ago

I thought it would print 10 at some point.

Freeman 5 months ago

Wait, why does it print 0 first?

Maddie 5 months ago

Totally agree, that's how scope works!

Flo 6 months ago

The output will be 05.

Jeff 6 months ago

Haha, this question is like a rite of passage for any C++ programmer. The output is a classic!

Suzan 6 months ago

Wait, what? How can the output be 0 5 10? I'm so confused, someone please help!

Aretha 6 months ago

Hmm, I thought the output would be 0 10 10. This C++ scoping thing is tricky.

Nichelle 6 months ago

Ah, the good old scope resolution! The output is spot on.

Audra 6 months ago

The inner block overrides the outer block's variable, so the output is 0 5 10.

Hyun 7 months ago

The output is 0 5 10.

Micah 7 months ago

I believe it prints 0, then 5, and finally 10. I just hope I got the scoping right!

Marg 7 months ago

I’m a bit confused about the order of outputs. I practiced a question like this, but I can't recall the exact details.

Torie 8 months ago

I remember something similar where inner scopes shadowed outer variables. So maybe it prints 0 first?

Isabelle 8 months ago

I think the output will be 0, 5, and then 10, but I'm not completely sure about the scope rules.

Jamie 8 months ago

Whoa, this is tricky. I better read through the code a few times and draw out the variable scopes to make sure I don't miss anything.

Wava 8 months ago

I think I've got it! The first cout will print 0, the second will print 5, and the third will print 10. I'll double-check my work, but I'm feeling confident about this one.

Ocie 8 months ago

I'm a bit confused by the nested blocks here. I'll need to make sure I understand how variable scope works in C++ to solve this one.

Barrett 9 months ago

Okay, let me think this through step-by-step. There are three blocks of code, each with a different value for the variable 'i'. I'll need to pay attention to which 'i' is being used in each cout statement.

Mozell 9 months ago

Hmm, this looks like a scope issue. I'll need to carefully trace the variable declarations and assignments to figure out the output.

Deandrea 2 months ago

↳ replying to Mozell

The last `cout` should print 5, right?

Fanny 3 months ago

↳ replying to Mozell

Yeah, because of the inner scope.

Rodrigo 3 months ago

↳ replying to Mozell

I think the first `cout` will print 0.

C++ Institute CPA-21-02 Exam - Topic 3 Question 49 Discussion