Delphi Learning -- Cardinal, getmem function, getcomputername function, MOD and Div Function

1. What is cardinal type?

For example, timer1.interval, how can I convert string to Cardinal?

 

It is not a 32-bit unsigned integer.

Strtointdef (S, 0 );

 

2. getmem Function

 

Memory is opened, which is equivalent to malloc of C.
VaR
Mystring: pchar;
Begin
Getmem (string, 1024); // 1024 bytes
Freemem (string, 1024); // release
End;

 

3. getcomputername Function

VaR
Computerbuf: array [0 .. 127] of char;
Computerbuflen: DWORD;
Begin
Computerbuflen: = 128;
Getcomputername (computerbuf, computerbuflen );
Showmessage (computerbuf );
End;

 

4. Mod and Div Functions

If
A branch B = c ...... D
Then

A mod B = D // mod is the remainder.
A Div B = C // div is the operator