simple bubble sort

👍 g++ -std=c++11 program64.cpp
👍 ./a.out 7 1
153 181 183 205 246 334 656
👍 ./a.out 7 1
294 313 334 450 557 599 844
👍 ./a.out 7 0
3 1 4 1 5 9 2
1 1 2 3 4 5 9

👍 cat program64.cpp 
#include <iostream>
using namespace std;

template <typename T>
void exch(T &a, T &b)
  { T t = a; a = b; b = t; }
template <typename T>
void compexch(T &a, T &b)
  { if (b < a) exch(a, b); }

template <typename T>
void bubble(T a[], int l, int r)
{
  for (int i = l; i < r; i++)
    for (int j = r; j > i; j--)
      compexch(a[j-1], a[j]);
}

int main(int argc, char *argv[])
{
  int i, N = atoi(argv[1]), 
        sw = atoi(argv[2]);
  int *a = new int[N];
  srand(time(0));
  if (sw)
    for (i = 0; i < N; i++)
      a[i] = 1000*(1.0*rand()/RAND_MAX);
  else 
    { N = 0; while (cin >> a[N]) N++; } 
  bubble(a, 0, N-1);
  for (i = 0; i < N; i++) cout << a[i] << " ";
  cout << endl;
}

    

ch 6.4 Bubble Sort p278 of