Convert std::string to char[]

//My function is for converting std::string to char[]
void stringConvertToChar(string& str,char arr[])	//To convert std::string to char[]
{
	char *y = new char[str.length() + 1];
	strcpy_s(y, str.c_str());
	strcpy_s(arr,y);
	return;
}

error: strcpy_s doe'snt accept 2 arguments.

i used strcpy_s as when i used strcpy(), the compiler was giving a warning of depriciated strcpy.

Please help!