把一个数组划分成左边奇数右边偶数

题目要求：把一个数组分成左边奇数右边偶数。要求效率尽量高。

代码如下：

#include <iostream>

using namespace std;

 

/*两数交换函数*/

void swap(int &a,int &b){
      int temp = a;
      a = b;
      b = temp;
}

/*划分函数*/

void partition_odd_even(int a[], int count){
       int low = 0;
       int high = count -1;
       while(low <= high){
              while(a[low] % 2 == 1)
                     low++;
              while(a[high] % 2 == 0)
                     high--;
              swap(a[low],a[high]);
              low++;
              high--;
      }
}

/*打印数组函数*/

void printarray(int a[], int count){
        for(int i =0; i < count; i++){
        cout<<a[i]<<"  ";
 }
}
int main(){
        int array[] = {1,2,3,4,5,6,7,8};
        int count = sizeof(array)/sizeof(int);
 
        printarray(array,count);
        partition_odd_even(array,count);
        cout<<endl;
        printarray(array,count);
  
        return 0;
}