单词复数 萌新求助 用c语言解决

单词复数。某单词本（文件）中有若干行单词单数形式，请在该单词后面给出单词复数形式，即单
词本中每一行是“单数 复数”形式。注：如果单词以 s、x、z、ch、或 sh 结尾，单词加 es；如果单词以 y 结
尾，并且 y 前面是一个辅音，将 y 改为 ies；对其他单词，后面加 s。
要代码，最好有备注

适用于每行一个单词的情况

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

#define BUFFER_SIZE  1024

typedef enum
{
    WORDS_ADD_S = 0,
    WORDS_ADD_ES,
    WORDS_ADD_IES,
}words_add_enum;

char yuanyi_judge(char c)
{
    int i = 0;
    char yuanyin[] = {'a','e','i','o','u'};

    for(;i < strlen(yuanyin); i++)
    {
        if(c == yuanyin[i])
        {
        //  printf("是元音\n");
            return 1;
        }
    }

    //printf("不是元音\n");
    return 0;
}

//判断末尾是否需要加es，last 最后一个单词，second 倒数第二个单词
char words_is_nedd_add_es(char last,char second)
{
    char res = 0;

    if(last == 'h')
    {
        if(second == 'c' || second == 's')
        {
            res = 1;
        }
    }
    else if(last == 's' || last == 'x'|| last == 'z')
    {
        res = 1;
    }
    else
    {
        res = 0;
    }

    //printf("末尾需要加es吗：%s\n",res == 1 ? "yes":"no");
    return res;
}

char data_combin(char *src,FILE *save)
{
    int data_len = 0;
    char *temp = NULL;
    words_add_enum words_add = WORDS_ADD_S;
    if(!src || !save)
    {
        //printf("%s,参数为空\n",__FUNC__);
        return 0;
    }



    data_len = strlen(src) ;
    //数据长度不含换行符
    if(src[data_len - 1] == '\n')
    {
        src[data_len - 1] = '\0';
        data_len -= 1;
    }

    ///拷贝单词
    temp = (char *)malloc(data_len + 1);
    strcpy(temp,src);

    if(data_len <= 1)
    {
        printf("单词无复数,原样输出\n");
        fputs(src,save);
        fputs("\n",save);
    }
    else
    {
        if(src[data_len -1] == 'y')
        {
            //是元音，加s
            if(!yuanyi_judge(src[data_len -2]))
            {
                words_add = WORDS_ADD_IES;
            }       
        }
        else if(words_is_nedd_add_es(src[data_len -1],src[data_len -2]))
        {
            words_add = WORDS_ADD_ES;
        }

        //src[data_len-1]='\0';
        if(words_add == WORDS_ADD_ES)
        {
            sprintf(src + data_len," %s%s\n",temp,"es");
        }
        else if(words_add == WORDS_ADD_IES)
        {
            sprintf(src + data_len," %s",temp);
            //去掉y
            sprintf(src + strlen(src) - 1 ,"%s\n","ies");
        }
        else
        {
            //sprintf(src + data_len," %s%s",src,"s");
            sprintf(src + data_len," %s%s\n",temp,"s");

        }

        ///不会自动输出换行
        fputs(src,save);

    }
    //释放内存
    free(temp);
    printf("复数%s\n",src);

    return 1;
}

//in_path 数据原始文件，out_path 转换后保存的文件
void words_convert(char *in_path,char *out_path)
{
    FILE *fp = NULL;
    FILE *fp_save = NULL;
    int num = 0;
    //char *temp_path = "./temp.txt";
    char buf[BUFFER_SIZE] = {0};

    if(!in_path || !out_path)
    {
        return ;
    }

    if((fp = fopen(in_path,"r")) == NULL)
    {
        printf("读取数据文件失败\n");
        return ;
    }

    if((fp_save = fopen(out_path,"w")) == NULL)
    {
        printf("创建临时数据文件失败\n");
        return ;
    }

    while(!feof(fp))
    {
        memset(buf,0,BUFFER_SIZE);
        if(!fgets(buf,BUFFER_SIZE,fp))
        {   
            printf("读取数据文件出错\n");
            return;
        }

        data_combin(buf,fp_save);
    }

    fclose(fp);
    fclose(fp_save);


}

//函数适用用每行一个单词的情况
void main(void)
{
    words_convert("words.txt","temp.txt");

    system("pause");
}

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char word[200];
scanf("%s", word);
int n = strlen(word);
if (word[n - 1] == 's' || word[n - 1] == 'x' || word[n - 1] == 'z')
{
word[n] = 'e';
word[n + 1] = 's';
word[n + 2] = '\0';
}
else if (n >= 2 && word[n - 1] == 'h')
{
if  (word[n - 2] == 'c' || word[n - 2] == 's')
{
word[n] = 'e';
word[n + 1] = 's';
word[n + 2] = '\0';
}
else
{word[n]='s';word[n+1]='\0';}
}
else if (n >= 2 && word[n - 1] == 'y')
{
if (word[n - 2] != 'a' && word[n - 2] != 'e' && word[n - 2] != 'i' && word[n - 2] != 'o' && word[n - 2] != 'u')
{
word[n - 1] = 'i';
word[n] = 'e';
word[n + 1] = 's';
word[n + 2] = '\0';
}
else
{word[n]='s';word[n+1]='\0';}
}
else
{word[n]='s';word[n+1]='\0';}
printf("%s", word);