#include<iostream>
using namespace std;
int main()
{
double d;
cin>>d;
cout<<"\nS="<<2*3.14*(d/4); // если нужна площадь , то заменить на cout<<"\nS="<<3.14*(d/4)*(d/4);
}
Const n=10;
<span>var i,j,k,mx,ind: integer;
</span><span> a: array[1..n] of integer;
</span><span>begin
</span><span> writeln('исходный массив:');
</span><span> randomize;
</span><span> mx:=0;
</span><span> for i:=1 to n do
</span><span> begin
</span><span> a[i]:=random(2*n)-n;
</span><span> write(a[i],' ');
</span><span> if a[i]>mx then
</span><span> begin
</span><span> mx:=a[i];
</span><span> ind:=i;
</span><span> end;
</span><span> end;
</span><span> writeln;
</span><span> for i:=ind+1 to n-1 do
</span><span> for j:=i+1 to n do
</span><span> if a[i]>a[j] then
begin
k:=a[i];
a[i]:=a[j];
a[j]:=k;
end;
</span><span> writeln('новый массив:');
</span><span> for i:=1 to n do write(a[i],' ');
</span><span>end.
</span>исходный массив:
<span>3 7 7 5 5 -2 -8 -9 -8 6
</span><span>новый массив:
</span><span>3 7 -9 -8 -8 -2 5 5 6 7
</span><span>
</span>
Var
a,b:real;
Begin
Write('a = ');ReadLn(a);
Write('b = ');ReadLn(b);
WriteLn('S = ',a*b);
End.
Uses Crt;
var
i:integer;
a:array[1..10] of integer;
count: integer;
Begin
ClrScr;
for i:=1 to 10 do begin
a[i]:=i*3;
if i mod 2 = 0 then a[i]:= a[i]*(-1);
write(a[i],' ');
end;
<span>End.</span>