👍 g++ -std=c++11 program62.cpp
👍 ./a.out 7 1
23 133 182 217 421 704 792 
👍 ./a.out 7 1
16 155 211 217 580 923 948 
👍 ./a.out 7 0
3 1 4 1 5 9 3
1 1 3 3 4 5 9

👍 cat program62.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 selection(T a[], int l, int r)
{
  for( int i = l; i < r; i++) {
    int min = i;
    for (int j = i+1; j <= r; j++)
      if (a[j] < a[min]) min = j;
    exch(a[i], a[min]);
  }
}

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++; } 
  selection(a, 0, N-1);
  for (i = 0; i < N; i++) cout << a[i] << " ";
  cout << endl;
}

    

ch 6.2 Selection Sort p273 of