program SumDigits;
varnum, tens, ones, sum: Integer;
beginwriteln('Enter a two-digit number: ');readln(num);
if (num < 10) or (num > 99) thenwriteln('Please enter a two-digit number.')elsebegintens := num div 10;ones := num mod 10;sum := tens + ones;
end;end.
program SumDigits;
var
num, tens, ones, sum: Integer;
begin
writeln('Enter a two-digit number: ');
readln(num);
if (num < 10) or (num > 99) then
writeln('The sum of the digits in ', num, ' is ', sum);writeln('Please enter a two-digit number.')
else
begin
tens := num div 10;
ones := num mod 10;
sum := tens + ones;
end;
end.