ptrsort.cpp

本课程主要介绍面向对象程序设计的方法和c++语言的基本概念。以c++语言中的面向对象机制为主。学习者在学习过程中可以通过大量的程序实例和相关练习

// ptrsort.cpp
// sorts an array using pointers
#include <iostream>
using namespace std;

int main()
   {
   void bsort(int*, int);       //prototype
   const int N = 10;            //array size
                                //test array
   int arr[N] = { 37, 84, 62, 91, 11, 65, 57, 28, 19, 49 };

   bsort(arr, N);               //sort the array

   for(int j=0; j<N; j++)       //print out sorted array
      cout << arr[j] << " ";
   cout << endl;
   return 0;
   }
//--------------------------------------------------------------
void bsort(int* ptr, int n)
   {
   void order(int*, int*);      //prototype
   int j, k;                    //indexes to array

   for(j=0; j<n-1; j++)         //outer loop
      for(k=j+1; k<n; k++)      //inner loop starts at outer
   order(ptr+j, ptr+k);         //order the pointer contents
   }
//--------------------------------------------------------------
void order(int* numb1, int* numb2)  //orders two numbers
   {                               
   if(*numb1 > *numb2)          //if 1st larger than 2nd,
      {
      int temp = *numb1;        //swap them
      *numb1 = *numb2;
      *numb2 = temp;
      }
   }