Question

我的任务是创建一个

的功能

打印一个表格，表明文本中每个不同单词的出现次数与它们出现的顺序相同

我正在使用gets()来读取字符串，这是一个标记字符串中每个单词并将其存储在二维数组中的函数，需要帮助找出如何制作分析数组的单词重复。

这是tokenizer函数：

void tokeniz(char *array)
{
    char words[arraySize][arraySize] = { NULL };

    const char s[2] = " ";
    char *token;
    int i = 0;

    token = strtok(array, s);

    while (token != NULL)
      {
        strcpy(words[i], token);
        token = strtok(NULL, s);
        i++;
      }
    wotable(words);
}

在程序的早期，我有一个函数来计算每个字符出现在字符串中的次数（预标记化）。我可以重新调整一些代码吗？

    void   alpha(char *array)
{
    char character = 'a';
    int numberOf = 0, tcc = 0;

    for (character = 'a'; character <= 'z'; character++)
    {
        tcc = (tcc + numberOf);
        numberOf = 0;
        for (int i = 0; i < arraySize; i++)
            if (*(array + i) == character)
                numberOf++;
        if (numberOf != 0)
            printf("\nNumber of %c's:\t\t%d\n", character, numberOf);
    }
    printf("\nTotal character count:\t%d\n\n- - - - - - - - - - - - - -", tcc);
}

Answer 1

不，您将无法重新调整其中一些代码。

Answer 2

以下代码：

干净地编译
需要在几个地方添加几行代码
有点浪费，因为每个新单词都会调用realloc()
正确检查错误
可能希望通过调用fgets()来取代对readline()的调用（请务必阅读/理解readline()的手册页）
可以将内存释放作为清理函数的一部分进行分离，因此代码只需要编写一次。

现在是代码

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

#define MAX_BUF_LEN (1024)

struct wordsAndCount
{
    char *pWord;
    size_t  count;
};


// note: following assumes words are not continued across multiple lines
int main( int argc, char *argv[] )
{
    if( 2 != argc)
    {
        fprintf( stderr, "USAGE: %s <inputFileName>\n", argv[0]);
        exit( EXIT_FAILURE );
    }

    // implied else, correct number of command line arguments

    FILE *fp = NULL;
    if( NULL != (fp = fopen( argv[1], "r") ) )
    { // fopen failed
        perror( "fopen for input file failed" );
        exit( EXIT_FAILURE );
    }

    // implied else, fopen successful

    struct wordsAndCount **table = NULL;
    size_t   countWords = 0;

    char buffer[ MAX_BUF_LEN ];
    char *token = NULL;
    char *delimeters = ",.;: '\"\n";

    while( fgets( buffer, sizeof buffer, fp ) )
    {
        token = strtok( buffer, delimeters );
        while( NULL != token )
        {
            struct wordsAndCount ** temp = realloc( table, (countWords+1)*sizeof (struct wordsAndCount *) );
            if( !temp )
            { // then realloc failed
                perror( "realloc failed" );
                fclose( fp );

                for( ; countWords; countWords-- )
                {
                    free( (*table[countWords]).pWord );
                }
                free( table );
                exit( EXIT_FAILURE );
            }

            // implied else, realloc successful

            table = temp;

            int foundIndex = 0;
            // if word already in table[] <-- need to add code for this
                (*table[foundIndex]).count++;
            //else
            {
                (*table[countWords]).pWord = strdup( token );
                if( !(*table[countWords]).pWord )
                { // then strdup failed
                    perror( "strdup failed" );
                    fclose( fp );

                    for( ; countWords; countWords-- )
                    {
                        free( (*table[countWords]).pWord );
                    }
                    free( table );
                    exit( EXIT_FAILURE );
                }

                // implied else, strdup successful

                (*table[countWords]).count = 1;
                countWords++;
            }

            token = strtok( NULL, delimeters );
        } // end while tokens
    } // end while more lines in input file

    // print words and counts <-- need to add code for this
} // end function: main

C - 查找每个单词在输入中出现的次数

2 个答案: