词频统计

#include
#include
#include
#define MAX 27 //26个字母和'
//字典树的结构体定义
typedef struct Word
{
Word *next[MAX];//数组下标0-25代表小写字母，26'
int num;
};
//结构体定义：单词和对应频率
typedef struct tlist
{ char word[200];
int time;
};
 struct tlist list[3000000];
Word *root;
char str[200]="";
char tempword[1000];
int size=0;
//新建单词的函数
void createWord(char *str)
{
int len = strlen(str), id;
Word *p = root, *q;
for(int i = 0; i < len; i ++)//遍历单词判断当前字符是否为字母或
{ if(str[i] >= 'a' && str[i] <= 'z')
id = str[i] - 'a';
if(str[i] >= 'A' && str[i] <= 'Z')
id = str[i] - 'A';
if(str[i] == '\'')
id = 26;
if(p->next[id] == NULL)//若已到达链表结尾，开辟新的结构体存入字母

{

q = (Word *)malloc(sizeof(Word));

for(int j = 0; j < MAX; j ++)

{q->num=0;q->next[j] = NULL;}

p->next[id] = q;
p = p->next[id];

}

else//若未到达链表结尾，指针指向下一个

 {

p = p->next[id];

}
}
p->num++;

}
//读单词的函数
void readWord(Word *p,int len)

{
int i;

for(i=0;i<27;i++)

{

if(p->next[i]!=NULL)

{

if (i==26)
{str[len+1]='\0';str[len]='\'';len++;}
else
{
str[len]='a'+i;
len++;
}
 readWord((Word*)p->next[i],len);
len--;
}

}
if(p->num!=0)

{
str[len]='\0'  ;

strcpy(list[size].word,str);

//如果遇到单词结束标志，将str存入

list[size].word ;

list[size].time=p->num;

size++;

}

}
//主程序
int main()

{

root=(Word*)malloc(sizeof(Word));

int i,j;

for (i=0;i<27;i++) root->next[i]=NULL;

FILE *fp;

char x;

int len=0;

fp=fopen("text.txt","r");

while((x=fgetc(fp))!=EOF) //从txt文档中读入

{

if ((x>='A'&&x<='Z')||(x>='a'&&x<='z')||(x=='\''&&len!=0))

{tempword[len]=x;len++;}

else {tempword[len]='\0';
createWord(tempword);

len=0;

}

}

tempword[len]='\0';

createWord(tempword);

len=0;

fclose(fp);

readWord(root,0);

//比较频率大小冒泡排序

struct tlist temp;

for(i=0;i
for(j=i+1;j
if(list[i].time>list[j].time||(list[i].time==list[j].time&&strcmp(list[i].word,list[j].word)>0))

{
temp.time=list[i].time;

list[i].time=list[j].time;


list[j].time=temp.time;


strcpy(temp.word,list[i].word);

 
strcpy(list[i].word,list[j].word);


strcpy(list[j].word,temp.word);

}
//强单词和对应频率输出到result.txt中
FILE*fpx;
fpx=fopen("result.txt","w");
for(i=0;ifprintf(fpx,"%s %d\n",list[i].word,list [i].time);
fclose(fpx);
return 0;
}