can any one give me a example why a complier might give you a error?

Question

need help on this

Give an example of an error you think a complier might report?
thats all i was given and its for vb

Answer 1

most compilers will give an error on division by zero

Answer 2

Hi.

A compiler checks syntax, semantics, and references.

syntax - the code you wrote does not match the grammar of the particular programming language. For example, grammar says you write an expression as A + B = C but you wrote it as A plus B eq C. That would generate a syntax error.

semantics - There are implied rules or sequences that you did not following. For example, in some languages you must declare a variable before you can use it.

var myVariable; // declaring a variable
myVariable + 1 = myVariable; //using variable in an expression

If I removed 'var myVariable;', the complier would generate an error.

references - Your code might references external code or libraries. The compiler would generate an error if it is unable to locate those libraries. For example, in C/C++ you use the #include directive to include a library. But if the library cannot be found, the compiler will generate an error.

Answer 3

A compiler usually gives an error when the process of compilation to binaries/executables encounter an error generated by the programmer(meaning Buggy codes).
There are many types of errors.The most troublesome type are those that occur at runtime(they pass the compilation), EG the screen suddenly freeze when playing a game.

Answer 4

I would say syntax error is the most common compiler error class, for example most languages only allow one assignment per statement so if you have two you will get an error

eg

a <= 3
b <= a

is legal but

b <= a <= 3

might not be (naturally, depending on the language).

Another class of error would be an illegal declaration, for example declaring the same variable as two different types.

eg

int avar
...
string avar

Answer 5

Very vague question!

A syntax error would be thrown if a random character was in the code which the compiler wasn't expecting.

e.g. in VB.net

Private Sub PopulateLocal(ByVal dr As SafeDataReader)
ID = dr.GetInt32("ID")
code = dr.GetString("code")
name = dr.GetString("name")
;
End Sub

The compiler would give you an error because of the ;

There are many many many more reasons why it might throw an error though.

Answer 6

In relation to VB

There are so many examples for Compiler errors
Any line which doesnot meet the syntax will be under Compiler errors

Suppose you want to show a message in a message box
Then we should write

MsgBox("Show this message in a message box")

But if we write the above as

MsgBox("show this)

this is a syntax error Or

Msg Box(show this") is also a compiler error


so on........

Answer 7

Any number of reasons. Syntax, unresolved symbol, missing or incomplete build requirement or environment, insufficient resources, the list can go on and on and on.

However, because you're being vague, I figure this is some kind of examination question, so go with syntax error.

Answer 8

It depends on what the error is. There are thousands of different errors and twice as many reasons.

Answer 9

Copy one of the messages above and try to compile it...:D.

Answer 10

*sarcasm*
Yeah sure, why don't u upload your entire coursework and we'll do it for you!