begin {ввод массива} if handsfree then n := random(20) + 5 else begin write('n = '); readln(n); end;
writeln('Данные массива:'); for i := 1 to n do begin if handsfree then begin a[i] := random(100) - 50; write(a[i], ' '); end else readln(a[i]); end; writeln();
{изменение элементов} for i := 1 to n do begin if i mod 2 = 0 then a[i] := a[i] / a[2] else a[i] := a[i] * a[1];
handsfree = false;
var
a: array[1..100] of real;
i, n: integer;
begin
{ввод массива}
if handsfree then
n := random(20) + 5
else begin
write('n = ');
readln(n);
end;
writeln('Данные массива:');
for i := 1 to n do
begin
if handsfree then begin
a[i] := random(100) - 50;
write(a[i], ' ');
end
else readln(a[i]);
end;
writeln();
{изменение элементов}
for i := 1 to n do
begin
if i mod 2 = 0 then
a[i] := a[i] / a[2]
else a[i] := a[i] * a[1];
write(a[i], ' ');
end;
end.
#include <iostream>
#include <cmath>
using namespace std;
int main(){
int x1,x2,x3,y1,y2,y3=0;
double s,p,a,b,c,pp=0;
cin>>x1>>y1>>x2>>y2>>x3>>y3;
a=sqrt(pow(float(x2-x1),2)+pow(float(y2-y1),2));
b=sqrt(pow(float(x3-x2),2)+pow(float(y3-y2),2));
c=sqrt(pow(float(x3-x1),2)+pow(float(y3-y1),2));
p=a+b+c;
pp=p/2;
s=sqrt(pp*(pp-a)*(pp-b)*(pp-c));
cout<<"S="<<s<<endl;
cout<<"P="<<p;
cin.get();
cin.get();
return 0;
}
Пример ввода:
1
1
1
5
6
7
Пример вывода:
S=10
P=17.1954