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Consider the following code snippet:
#include <iostream>
#include <iostream>
void incrementValue(int& num) {
num++;
}
num++;
}
int main() {
int x = 5;
incrementValue(x);
int x = 5;
incrementValue(x);
std::cout << x;
return 0;
}
What will be the output of the above code?
}
What will be the output of the above code?
- a)5
- b)6
- c)Error
- d)Undefined behavior
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following code snippet:#include <iostream>void incr...
The 'incrementValue' function takes an integer reference as a parameter and increments its value by 1. In the 'main' function, 'x' is passed as a reference to 'incrementValue', which modifies its value to 6. Therefore, the output will be 6.
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Community Answer
Consider the following code snippet:#include <iostream>void incr...
Explanation:
Passing arguments by reference:
- In the given code snippet, the function `incrementValue` takes an integer reference as an argument.
- This means that any changes made to the reference inside the function will affect the actual variable passed to the function.
Incrementing the value:
- Inside the `incrementValue` function, the value of `num` (which is a reference to `x` in the `main` function) is incremented by 1.
Output:
- After calling the `incrementValue` function with `x` as the argument, the value of `x` in the `main` function will be updated to 6.
- Therefore, the output of the code will be 6.
Therefore, the correct answer is option 'B) 6'.
Passing arguments by reference:
- In the given code snippet, the function `incrementValue` takes an integer reference as an argument.
- This means that any changes made to the reference inside the function will affect the actual variable passed to the function.
Incrementing the value:
- Inside the `incrementValue` function, the value of `num` (which is a reference to `x` in the `main` function) is incremented by 1.
Output:
- After calling the `incrementValue` function with `x` as the argument, the value of `x` in the `main` function will be updated to 6.
- Therefore, the output of the code will be 6.
Therefore, the correct answer is option 'B) 6'.
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