c++17(12)-raw string,u8,L

#include <iostream>
#include <cstring> 
using namespace std;


int main(int argc, char **argv)
{
   
    char *str1=R"(\\\\n(*73&^%4)
                2@~!/.,>><<
                !!!)";
   auto str2=L"hello";
   auto str3=u8"世界hello";
   cout<<str1<<endl;
   cout<<str3<<endl;
   wcout<<str2<<endl;
}

R原样输出
L输出wchar
u8输出UTF8

\\\\n(*73&^%4)
                2@~!/.,>><<
                !!!
世界hello
hello

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