time1.cpp

来自「一本全面剖析C++数据结构算法的书籍」· C++ 代码 · 共 24 行

// worst case insertion sort times
// bad when times are small

#include <iostream.h>
#include <time.h>
#include "insort.h"

void main(void)
{
   int a[1000], step = 10;
   clock_t start, finish;
   for (int n = 0; n <= 1000; n += step) {
      // get time for size n
      for (int i = 0; i < n; i++)
         a[i] = n - i; // initialize
      start = clock( );
      InsertionSort(a, n);
      finish = clock( );
      cout << n << ' ' << (finish - start) / CLOCKS_PER_SEC << endl;
      if (n == 100) step = 100;
      }
   }