a)
var i,s,k,m:integer;
begin
WriteLn('vvedi chislo i=');
ReadLn(i);
s:=i;
k:=0;
repeat
i:=i div 10;
k:=k+1;
until i=0;
m:=1;
for i:=1 to k-1 do
m:=m*10;
m:=s div m;
i:=0;
repeat
if m=s mod 10 then
i:=i+1;
s:=s div 10;
until s=0;
WriteLn('chislo pervix cifr=',i);
ReadLn;
end.
б)
var i,k,a,b,s,m:integer;
begin
WriteLn('vvedi chislo i=',' a=',' b=');
ReadLn(i,a,b);
s:=i;
k:=0;
repeat
i:=i div 10;
k:=k+1;
until i=0;
m:=1;
for i:=1 to k-1 do
m:=m*10;
if b=s mod 10 then
if a=s div m then
WriteLn('chislo nachin.a=',a,' chislo zakan.b=',b)
else WriteLn('_nepravilno_')
else
WriteLn('_nepravilno_');
ReadLn;
end.
Вариант 2
Program xxx;
Uses Crt;
Var x,a1,b1:string;
a,b:string[1];
k:integer;
Begin
Clrscr;
Write('Введите натуральное число = ');readln(x);
Write('Введите начало = ');readln(a);
Write('Введите окончание = ');readln(b);
a1:= copy(x,1,1);
Repeat
delete(x,1,1);
k:=length(x);
Until k=1;
b1:=x;
If (a1=a) and (b1=b)
then writeln('Совпадают!')
else Writeln('Не совпадают!');
readkey;
End.
Вариант 3
Program xxx;
Uses Crt;
Var x,a,b:string;
Begin
Clrscr;
Write('x = ');readln(x);
Write('a = ');readln(a);
Write('b = ');readln(b);
If (a=x[1]) and (b=x[Length(x)])
then writeln('da')
else Writeln('net');
readkey;
End.