学步园

// insertion.h

#ifndef _INSERTION_H_
#define _INSERTION_H_

extern int sort_data[100];

int input_data( void );
void insertion_sort( int data_len );
void output_data( int data_len );

#endif

//insertion.cpp

#include <iostream>

using namespace std;

int sort_data[100];

int input_data( void )
{
 int data_num, ret, i = 0;

 cout<<"How much data, please input : ";
 cin >> data_num;
 ret = data_num;
 
 if( data_num < 1 ){
  cout << "Invalid Input !"<< endl;
  exit(0);
 }

 while(data_num--){
  cout << "input data " << ret - data_num << ":";
  cin >> sort_data[i++];
 }
 
 return ret;
}

void output_data( int data_len )
{
 int i = data_len;

 while( i > 0 && i-- ){
  cout << sort_data[data_len - i - 1] << endl;
 }
}

void insertion_sort( int data_len )
{
 int i, j, key;

 for( j = 1; j < data_len; j++ ){
  key = sort_data[j];
  i = j - 1;
  while( i >= 0 && sort_data[i] > key ){
   sort_data[i+1] = sort_data[i];
   i--;
  }
  sort_data[i+1] = key;
 }
}

//main.cpp

#include <iostream>
#include "insertion.h"

using namespace std;

int main(int argc, char **argv)
{
 int input_len;
 input_len = input_data();
 insertion_sort( input_len );
 output_data( input_len );

 return 0;
}