function Len(x1,y1, x2, y2:real):real;
begin
Len := sqrt( sqr(x1 - x2) + sqr(y1 - y2) );
end;
var
x1,x2,x3,x4,x5, y1, y2, y3, y4, y5:real;
begin
write('x1 = '); readln(x1);
write('y1 = '); readln(y1);
write('x2 = '); readln(x2);
write('y2 = '); readln(y2);
write('x3 = '); readln(x3);
write('y3 = '); readln(y3);
write('x4 = '); readln(x4);
write('y4 = '); readln(y4);
write('x5 = '); readln(x5);
write('y5 = '); readln(y5);
writeln('P = ', Len(x1,y1,x2,y2) + Len(x2,y2,x3,y3) + Len(x3,y3,x4,y4) + Len(x4,y4,x5,y5) + Len(x5,y5,x1,y1));
end.
#include <iostream>
#include <vector>
#include <cstdlib>
#include <ctime>
using namespace std;
int main() {
srand(time(0));
setlocale(LC_ALL, "Russian");
vector< vector<int> > arr;
vector<float> average;
float result = 0;
arr.resize(10);
for (int i = 0; i < arr.size(); ++i) {
arr[i].resize(10);
}
for (int i = 0; i < arr.size(); ++i) {
for (int j = 0; j < arr[i].size(); ++j) {
arr[i][j] = rand()%10;
cout << arr[i][j] << " ";
if (j == arr[i].size() - 1) {
cout << endl;
}
}
}
for (int i = 0; i < arr.size(); ++i) {
if (arr[i][arr[i].size() - 1] == 1) {
for (int j = 0; j < arr[i].size(); ++j) {
average.push_back(arr[i][j]);
}
}
}
for (int i = 0; i < average.size(); ++i) {
result += average[i];
}
if (average.size() == 0) {
cout << endl << "Единицы отсутствуют.";
return 0;
}
result /= average.size();
cout << result;
}