1. I don't know why, the installed Visual Studio seems to be unsatisfactory, and some of the methods of some data types is actually no!
such as:
INT MyNumber = int32.fromstring (s);
Note: f: My Documentsvisual Studio ProjectSexam3_5class1.cs (28): "int" does not include the definition of "fomstring"
(This problem has been resolved: change to int myNumber = int32.parse (s); or int myNumber = convert.toint32 (s);)
Stream s = (New File ("LinkedList.bin"). (Filemode.open);
Report: f: My Documentsvisual Studio ProjectSexam2_16Class1.cs (51): Overload "Open" method does not get "1" parameters
2, when you look predefined, there is a place to see,
The book says:
Predefined declaration statement #define can not directly follow the actual code, but you can directly contact other preprocessing statements, such as the following statement is correct:
#define a
#if a
#define b
#ENDIF
Namespace Exam3_6
{
Using system;
#if B
Public Class Class 1 {}
#ENDIF
}
But the following statement is wrong:
#define a
Namespace Exam3_6
{
#define b
#if B
Public class clas1 {}
#ENDIF
}
Compile it in the compiler, report an error in the line of #define b:
F: My Documentsvisual Studio ProjectSexam3_6class1.cs (4): You cannot define or unfained the pre-processor symbol after the first tag of the file.
But I still don't understand, where is it wrong?
