function and array

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cmath>
using namespace std;
  void printTemperature() {
  cout << "It is 70 degrees F!" << endl;
}
 void add2Nums(int a, int b) {
    int sum = a+b;
    cout << sum << endl;
}
double hypot(double base, double height) {
     return sqrt(base*base + height*height);
    ;
}
int main() {

  int student[5] = { 1, 2, 3, 4, 5};
  cout << student[0] << endl; 
  cout << student[1] << endl; 
  cout << student[2] << endl; 
  cout << student[3] << endl;
  string abc[5] = { "a","bbb","cc","ss","sss"};
  cout << abc[1]<< endl;
  
  int n = 15;
  double random[n];
  for (int i = 0;i < n; i++)
  {
      random[i] = ((double)rand())/RAND_MAX;
      cout << random[i] << endl;
  }
  double sum = 0.0;
  for (int i = 0; i<n;i++)
  {
      sum += random[i];
  }
  cout << "sum is:"<< sum << endl;
  cout << "mean is :" << sum/n << endl;
  int m[3][2];
  m[0][0] = 1;
  m[1][0] = 2; m[2][0] = 3;m[0][1] = 1; m[1][1] =2 ; m[2][1] = 3;
  cout<< m[0][0]<< endl;
  int q[2][3] = {{1,2,3},{3,4,5}};

  for (int i=0;i<5;i++){
      printTemperature();
      add2Nums(i,5);
  }
  double hypoten = hypot(5,4);
  cout.precision(10);
  cout << fixed<<hypoten << endl;
  double h = (hypot(1,2),hypot(5,6));
  cout.precision(5);
  cout << h << endl;
}