實現按指定字母序進行排序

給定 n 個字符串：abc dca add ae…

最終排序結果爲：abc ae add dca

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>

char need_arr[] = "abcdefghijklmnopqrstuvwxyz";
typedef char *Words;   
Words *wordarr;              //wordarr中存放分割完成的字符串
int arrsize = 0;;            //分割完成的字符串的個數
#define MAXWORDS 1000        //wordarr能存放的字符串最大值
#define MAXWORDSLEN 20       //字符串的最大長度

//字符串分割
bool splitstr(char *str)
{
	if(str == NULL)
	{
		return false;
	}

	int i = 0;
	wordarr = (char**)malloc(sizeof(Words) * MAXWORDS);

	char *s = strtok(str, " ");
	while(s != NULL)
	{
		printf("%s\n", s);
		wordarr[i] = (char *)malloc(sizeof(s) + 1);
		memset(wordarr[i], 0, MAXWORDSLEN);
		strcpy(wordarr[i], s);
		i++;
		s = strtok(NULL, " ");
	}

	arrsize = i;
	return true;
}

static int Position(char *str, char c)
{
	assert(str != NULL);
	char *tmp = strchr(str, c);

	if(tmp == NULL)
	{
		return -1;
	}

	return (tmp - str) / sizeof(char);
}

//根據自己制定的字符串順序表比較字符串的大小
int ComStr(char *str1, char *str2)
{
	int result = 0;
	int i = 0;
	int len = strlen(str1)>strlen(str2) ? strlen(str2) : strlen(str1);

	while(result == 0 && i < len)
	{
		if((Position(need_arr, str1[i])) > (Position(need_arr, str2[i])))
		{
			return 1;
		}

		else if((Position(need_arr, *(str1+i))) < (Position(need_arr, str2[i])))
		{
			return -1;
		}

		else
		{
			return 0;
		}
		
		i++;
	}

	if(result == 0)
	{
		if(strlen(str1) > strlen(str2))
		{
			return 1;
		}

		else if(strlen(str1) < strlen(str2))
		{
			return -1;
		}
	}
}

//交換字符串，小的字符串放前面
int SwitchStr(char **str1, char **str2)
{
	char *tmp;
	tmp = *str1;

	if((ComStr(*str1, *str2)) > 0)
	{
		*str1 = *str2;
		*str2 = tmp;
	}

	return 0;
}

//冒泡排序
int Sort_Word(Words *words)
{
	int i;
	int j;

	for(i=0; i<arrsize; i++)
	{
		for(j=i+1; j<arrsize; j++)
		{
			SwitchStr((words+i),(words+j));
		}
	}

	return 0;
}

int main()
{
	char str[] = "abc acd auh dn dj mx  mdc kf uf lcm ld ueh hdb svx oos";
	printf("%s\n", str);

	if(splitstr(str))
	{
		Sort_Word(wordarr);
	}

	for(int i=0; i<arrsize; i++)
	{
		printf("%s ", wordarr[i]);
	}

	printf("\n");

	return 0;
}

 

運行結果：