Validando o CPF
interface
function cpf(num: string): boolean;
implementation
uses SysUtils;
function cpf(num: string): boolean;
var
n1,n2,n3,n4,n5,n6,n7,n8,n9: integer;
d1,d2: integer;
digitado, calculado: string;
begin
n1 := StrToInt(num[1]);
n2 := StrToInt(num[2]);
n3 := StrToInt(num[3]);
n4 := StrToInt(num[4]);
n5 := StrToInt(num[5]);
n6 := StrToInt(num[6]);
n7 := StrToInt(num[7]);
n8 := StrToInt(num[8]);
n9 := StrToInt(num[9]);
d1 := n9*2+n8*3+n7*4+n6*5+n5*6+n4*7+n3*8+n2*9+n1*10;
d1 := 11-(d1 mod 11);
if d1> = 10 then
d1 := 0;
d2 := d1*2+n9*3+n8*4+n7*5+n6*6+n5*7+n4*8+n3*9+n2*10+n1*11;
d2 := 11-(d2 mod 11);
if d2> = 10 then
d2 := 0;
calculado:=inttostr(d1)+inttostr(d2);
digitado:=num[10]+num[11];
if calculado=digitado then
cpf := true
else
cpf:=false;
end;