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What will be the output of the following C++ code?
#include<iostream>
using namespace std;
int fun(int x = 0, int y = 0, int z)
{ return (x + y + z); }
int main()
{
cout << fun(10);
return 0;
}
using namespace std;
int fun(int x = 0, int y = 0, int z)
{ return (x + y + z); }
int main()
{
cout << fun(10);
return 0;
}
- a)10
- b)0
- c)Error
- d)Segmentation fault
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
What will be the output of the following C++ code?#include<iostream...
Explanation:
- Error in the code:
The code will not compile because the default arguments must be specified from right to left. In the function definition of fun(int x = 0, int y = 0, int z), the default arguments for x and y are provided but not for z. Since default arguments must be specified from right to left, this code will result in a compile-time error.
- Explanation of the error:
When the compiler encounters the function call fun(10) in the main function, it expects to see the third argument z being provided since it does not have a default value. Since z is missing in the function call, the compiler will generate an error.
- Compilation error:
The error message will indicate that there is no matching function for fun and that the number of arguments is incorrect. This is because the function definition of fun() expects 3 arguments, but only 1 argument is provided in the function call.
Therefore, the output of the code will be an error message during compilation.
- Error in the code:
The code will not compile because the default arguments must be specified from right to left. In the function definition of fun(int x = 0, int y = 0, int z), the default arguments for x and y are provided but not for z. Since default arguments must be specified from right to left, this code will result in a compile-time error.
- Explanation of the error:
When the compiler encounters the function call fun(10) in the main function, it expects to see the third argument z being provided since it does not have a default value. Since z is missing in the function call, the compiler will generate an error.
- Compilation error:
The error message will indicate that there is no matching function for fun and that the number of arguments is incorrect. This is because the function definition of fun() expects 3 arguments, but only 1 argument is provided in the function call.
Therefore, the output of the code will be an error message during compilation.
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Community Answer
What will be the output of the following C++ code?#include<iostream...
Default arguments should always be declared at the rightmost side of the parameter list but the above function has a normal variable at the rightmost side which is a syntax error, therefore the function gives an error.
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What will be the output of the following C++ code?#include<iostream>using namespace std;int fun(int x = 0, int y = 0, int z){ return (x + y + z); }int main(){ cout << fun(10); return 0;}a)10b)0c)Errord)Segmentation faultCorrect answer is option 'C'. Can you explain this answer?
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