//用C编写程序:输入一系列整数,保存这些整数,将所有奇数放在所有偶数之前,并且奇数部分和偶数部分需要按从小到大顺序排列,最后输出。
#include "stdio.h"
#include "stdlib.h"
typedef struct node{
int x;
struct node *next;
}llnode;
llnode* getNumberList()//此函数建立临时链表,用来接收用户输入
{
int number = 0;
llnode *head = (llnode *)malloc(sizeof(llnode));
llnode *p = head;
p->x = 0;
p->next = NULL;
printf("请输入一列整数,数字之间用空格隔开,以输入#并回车结束:");
while(scanf("%d", &number))
{
llnode *n = (llnode *)malloc(sizeof(llnode));
n->x = number;
n->next = NULL;
p->next = n;
p = n;
head->x ++;
}
return head;
}
int* getNumberArray(llnode *head)//此函数用来处理用户输入,把用户输入从链表转移到动态数组,以便后面的操作
{
llnode *p = head;
llnode *q = head;
int *numberarray;
int i;
numberarray = (int *)malloc(sizeof(int)*(head->x));
p = head->next;
while(p!=NULL)
{
numberarray[i] = p->x;
i++;
p = p->next;
}
return numberarray;
}
void removeNumberList(llnode *head)//此函数用于删除临时链表,释放空间
{
llnode *p = head;
llnode *q = head;
while(p!=NULL)
{
q = p->next;
free(p);
p = q;
}
}
void divideNumberArray(int *numberarray, int n)//此函数用于把奇数放到偶数的前面
{
int start = 0;
int end = n-1;
int swap = 0;
for(start=0; start<end; start++)
{
if(numberarray[start]%2 == 0)
{
for(; end>start; end--)
{
if(numberarray[end]%2 == 1)
{
swap = numberarray[start];
numberarray[start] = numberarray[end];
numberarray[end] = swap;
break;
}
}
}
}
}
int getCut(int* numberarray, int n)//此函数用于得到奇数和偶数的划分点
{
int i = 0;
for(i=0; i<n; i++)
{
if(numberarray[i]%2 == 0)
{
return i;
}
}
}
void sortNumberArray(int* numberarray, int start, int end)//此函数用于对指定范围内的数据进行升序排序
{
int i = 0;
int j = 0;
int min = 0;
int swap = 0;
for(i=start; i<=end; i++)
{
min = i;
for(j=i+1; j<=end; j++)
{
if(numberarray[j] < numberarray[min])
{
min = j;
}
}
swap = numberarray[min];
numberarray[min] = numberarray[i];
numberarray[i] = swap;
}
}
int main()
{
int i = 0;
int nodecount = 0;
int *numberarray;
int cut = 0;
llnode *head;
head = getNumberList();//由于不确定用户输入数据的多少,所以要采用链表,这样就解决了不知道用户会输入多少个数字的情况
nodecount = head->x; //记录一下用户输入了多少数据
numberarray = getNumberArray(head);//把临时链表的数据放到动态数组以便后续的处理
removeNumberList(head);//至此numberarray存储了用户输入的所有数据,我们可以把之前的链表删除了,要不然会浪费内存资源
//至此我们可以专心处理数组numberarry了,nodecount是数组元素个数
divideNumberArray(numberarray, nodecount);//把奇数放到偶数的前面
cut = getCut(numberarray, nodecount);//得到奇数和偶数的划分点
sortNumberArray(numberarray, 0, cut-1);//对奇数排序
sortNumberArray(numberarray, cut, nodecount-1);//对偶数排序
for(i=0; i<nodecount; i++)//输出结果
{
printf("%d ", numberarray[i]);
}
printf("\n");
return 0;
}
2022年9月15日 16:58
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