计算一篇文章中单词出现的频率，并把输出频率最高的十五个单词输出来_3. 完成对“三国演义”节选中所有词进行频率统计并输出出现最多的15个词。-优快云博客

本文链接：https://blog.youkuaiyun.com/ruoxin0802/article/details/7341625

本文介绍了一个简单的C语言程序，该程序用于统计英文文章中单词的出现频率，并按频率高低排序，最后输出出现频率最高的前15个单词及其对应的频数。

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

#define WORDNUM 65535 // max word number
#define WORDLENGTH 15 // word max length
#define PRINTWORDNUM 15 //out put max word number

char differentword[WORDNUM][WORDLENGTH]={0};//different word info
int differentCount[WORDNUM];//equal word number
int iIndex = 0;//current file word total number
int iWordCount =0;//current file different word number

void GetWordInfo(FILE *fpRead);
void SetWordList(char word[WORDLENGTH]);
void OrderWordList();
void OutPutWordList();

void DealWithWord()
{
FILE *fpRead;

if((fpRead = fopen("D:\word.txt", "r")) == NULL)
{
printf("Cannot read file %s\n", "D:\word.txt");
return;
}

GetWordInfo(fpRead);
OrderWordList();
OutPutWordList();
}

void GetWordInfo(FILE *fpRead)
{
int jIndex = 0;
int i = 0;
char ch;
char word[WORDLENGTH]={0};

while((ch=fgetc(fpRead))!=EOF)
{
   //putchar(ch);
   if ((ch >= 65 && ch <=90) ||(ch >= 97 && ch <=122))
   {
    if (jIndex < WORDLENGTH)
    {
     word[jIndex] = ch;
     jIndex ++;
    }
   }
   else
   {
    if (jIndex != 0)
    {
     SetWordList(word);

     jIndex = 0;
     iIndex ++;
    }
   }
}
}

void SetWordList(char word[WORDLENGTH])
{
int i;
int iEqual = 0;

if (iIndex == 0)
{
   strcpy(differentword[0],word);
   differentCount[0] = 0;
   iWordCount ++;
}

for (i = 0; i < iWordCount; i ++)
{
   if (strcmp(differentword[i],word) == 0)
   {
    differentCount[i] ++;
    iEqual = 1;
   }
}

if (iEqual == 0)
{
   strcpy(differentword[iWordCount],word);
   differentCount[iWordCount] ++;
   iWordCount ++;
}

for (i = 0; i <WORDLENGTH; i ++)
{
word[i] = '\0';
}
}

void OrderWordList()
{
int iCurrent = 0;
int i,j,tempValue;
char wordTemp[WORDLENGTH]={0};

for (i = 0; i < iWordCount; i ++)
{
   iCurrent = i;
   for (j = i + 1; j < iWordCount; j ++)
   {
    if (differentCount[iCurrent] < differentCount[j])
    {
     iCurrent = j;
    }
   }

   if (iCurrent != i)
   {
    tempValue = differentCount[iCurrent];
    differentCount[iCurrent] = differentCount[i];
    differentCount[i] = tempValue;

    strcpy(wordTemp,differentword[iCurrent]);
    strcpy(differentword[iCurrent],differentword[i]);
    strcpy(differentword[i],wordTemp);
   }
}
}

void OutPutWordList()
{
int i;
for (i = 0; i < iWordCount && i < PRINTWORDNUM; i ++)
{
printf("%s %d\n", differentword[i], differentCount[i]);
}
}

int main(int argc, char* argv[])
{ // 从英語文章中统计出单词出現の频率,打印出前15个出现频率高的单词

DealWithWord();

getchar();
}