Why is this code showing compilation error?

Question

https://code.sololearn.com/c45TfnOLPwZ7/?ref=app

Answer 1

Because while copying/pasting your code to the playground some illegal characters from the document in which you copied the code is also got paste there.

See this: cpp.sh/7c4u5

Answer 2

"Is it valid?"

To some extent!
To make it possible to correctly handle the wide character set (e.g. Unicode) you'd do it this way

#include <iostream>
#include <stdio.h>
#include <io.h> // Windows-specific header
#include <fcntl.h>
using namespace std;

int main()
{
_setmode(_fileno(stdout), _O_U8TEXT); // Sets the file translation mode ¹
wprintf(L"\xFEFF"); // Byte order mark (magic number necessary to work with Unicode) ²
wchar_t w = L'ب';
//wcin >> w;
wcout << L"Wide character value:: " << w << endl;
return 0;
}

Output:
ب

_____
¹ https://docs.microsoft.com/en-us/previous-versions/tw4k6df8(v=vs.140)
² https://en.wikipedia.org/wiki/Byte_order_mark
https://code.sololearn.com/cWtSLDT8JYCn

Answer 3

Some special symbol are present inn your code so it giving error this special symbol come because of copy the code from your notepad to sololearn fixed now
https://code.sololearn.com/cpkcP36Vikzf/?ref=app

Answer 4

Thanks for helping 😊

Answer 5

Can you please tell me a way to take input from user which I want to assign to a variable of wchar_t data type? I found this way. Is it valid?

https://code.sololearn.com/c91P7zSbxnwM/?ref=app