Var x : array[1..100] of integer;
n,i,s,b : integer;
begin
write('n = ');
readln(n);
writeln('Исходный массив:');
for i:=1 to n do begin
write('x[',i,']=');
readln(x[i]);
end;
writeln;
s:=0;
for i:=1 to n div 2 do
begin
b:=x[i]; x[i]:=x[n+1-i]; x[n+1-i]:=b;
end;
for i:=1 to n do
begin
write(x[i],' ');
if i mod 2 = 0 then s:=s+x[i];
end;
writeln;
writeln('s = ',s);
end.
Пример:
n = 6
Исходный массив:
x[1]=12
x[2]=54
x[3]=71
x[4]=30
x[5]=47
x[6]=29
29 47 30 71 54 12
s = 130