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AnsiStrComp function

In unit sysutils

Compare two null-terminated strings. Case sensitive.

Declaration

pascal
function AnsiStrComp(S1: PAnsiChar; S2: PAnsiChar): Integer

Description

AnsiStrComp compares 2 PChar strings, and returns the following result:

<0
if S1<S2.
0
if S1=S2.
>0
if S1>S2.

The comparison of the two strings is case-sensitive.

A widestring manager must be installed in order for this function to work correctly with various character sets.

Errors

None.

See also

Example: ex54

pascal
Program Example54;

{ This program demonstrates the AnsiStrComp function }

Uses sysutils;

Procedure TestIt (S1,S2 : Pchar);

Var R : Longint;

begin
  R:=AnsiStrComp(S1,S2);
  Write ('"',S1,'" is ');
  If R<0 then
    write ('less than ')
  else If R=0 then
    Write ('equal to ')
  else
    Write ('larger than ');
  Writeln ('"',S2,'"');
end;

Begin
  Testit('One string','One smaller string');
  Testit('One string','one string');
  Testit('One string','One string');
  Testit('One string','One tall string');
End.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.