用户指定文件中的单词和句子计数器

Question

我正在尝试建立一个计数器，该计数器将对文本文件中的单词和句子进行计数。我正在努力在程序中实现字母数字查找器。我需要帮助。这是我到目前为止所得到的。该程序计数不正确。它一直在计算空格。

 int main (void)
{
    // Local Variables
    char         path[30] ; // File path size
    unsigned int words   ; //total number of words
    unsigned int sentences ; //total number of sentences
    char ch ;

    FILE *file; // text file to be opened

    // Intialize counter variables
    words = 0;
    sentences = 0;

    //prompt user for file path
    printf ("enter source file path: ");

    //stores the file name in path.
    scanf ( "%s" , path);

    //reads file name
    file = fopen ( path , "r");

    //check if file name is valid
    if ( file == NULL )
    {
       printf ( "Please enter a valid file name" );
    }

    //while function to count sentences and words
    while (( ch = fgetc(file)) != EOF  )
    {
        // check for a period, exclamation or question mark.
        //if true count sentence
        if ( (ch == '.') || (ch == '!') || (ch == '\?') )
        {
            sentences++;
        }


        // if there is a space or tab or space is true. count words
        else if ( ch == ' ' || ch == '\t'  )
        {

        words++;
         }

        }
    //displays to the user the amount of words and sentences in the text file.
    printf ( "total words = %d\n" , words );
    printf ( "total sentences = %d\n" , sentences);


}

Answer 1

正如Arkku所述，您可能要防止出现多个空格或多个句点等，从而给您一个错误的计数，该计数过高。

您可以使用其他状态/类型变量来处理。

这里是代码的少许重构（请注意，switch/case有点干净）。另外，我添加了换行符（\n）作为单词分隔符，并将'\?'更改为'?'：

//while function to count sentences and words
int type = -1;
while ((ch = fgetc(file)) != EOF) {
    switch (ch) {
    // check for a period, exclamation or question mark.
    // if true count sentence
    case '.':
    case '!':
    case '?':
        if (type != 1)
            sentences++;
        type = 1;
        break;

    // if there is a space or tab or space is true. count words
    case ' ':
    case '\t':
    case '\n':
        if (type != 2)
            words++;
        type = 2;
        break;

    default:
        type = 0;
        break;
    }
}