#include<stdio.h>
#include<string.h>
#include<io.h>
#include<stdlib.h>
#define MAXSIZE 1024

//统计字符数
void countchar(char* filename)
{
    char c;
    int charnum = 0;
    FILE* fp;
    fp = fopen(filename, "r");
    if (fp == NULL)
        {
       printf("打开文件失败或文件不存在\n");
    }
    else
    {
        c = fgetc(fp);
        while (c != EOF)
        {
                charnum++;
            c = getc(fp);
            }
        printf("字符数：%d\n", charnum);
        fclose(fp);
    }
}

 1 //统计文件行数
 2 void countline(char* filename)
 3 {
 4     FILE* fp;
 5     int linenum = 0;
 6     char c;
 7     fp = fopen(filename, "r");
 8     if (fp == NULL)
 9     {
10         printf("打开文件失败或文件不存在");
11         return;
12     }
13     c = fgetc(fp);
14     if (c != EOF) linenum++;
15     while (c != EOF)
16     {
17         if (c == ‘\n‘ || c == ‘\r‘)
18             linenum++;
19         c = fgetc(fp);
20     }
21     printf("行数：%d\n", linenum);
22     fclose(fp);
23 }

//统计词数，一个字母算作一个单词
void countword(char* filename)
{
    int wordnum = 0;
    char c;
    int judge = 0;
    FILE* fp;
    fp = fopen(filename, "r");
    if (fp == NULL)
    {
        printf("打开文件失败或文件不存在");
        return;
    }
    c = fgetc(fp);
    while (c != EOF)
    {
        if ((c >= ‘a‘ && c <= ‘z‘) || (c >= ‘A‘ && c <= ‘Z‘))
        {
            judge = 1;        //记录前一个字符是不是字母
        }
        else
            judge = 0;
        c = fgetc(fp);
        if (c == EOF) break;
        if (!((c >= ‘a‘ && c <= ‘z‘) || (c >= ‘A‘ && c <= ‘Z‘)))
            if (judge == 1)
                wordnum++;
    }
    if (judge == 1)
        wordnum++;
    printf("词数：%d\n", wordnum);

    fclose(fp);
}

//统计空行和代码行
void countSline(char* filename)
{
    int spaceline = 0;        //空行
    int codeline = 0;        //代码行
    char c;
    int jnull=1;        //标志此行是不是空行
    FILE* fp;
    fp = fopen(filename, "r");
    if (fp == NULL)
    {
        printf("文件打开失败或文件不存在");
        return;
    }
    do
    {
        c = fgetc(fp);
        if (c == ‘\n‘)
        {
            if (jnull == 1) spaceline++;
            else codeline++;
            jnull = 1;                //每一行开始时默认为空行
        }
        if (c != ‘ ‘ && c != ‘\n‘ && c != ‘\r‘&&c!=-1)  //不是空格或换行或文件末尾，则不是空行
            jnull = 0;
    } while (!feof(fp));
    if (jnull == 1) spaceline++;    //最后一行判断（没有换行符要独立判断）
    else codeline++;
    printf("代码行：%d\n", codeline);
    printf("空行：%d\n", spaceline);
    fclose(fp);
}

//输入 目录时调用此函数处理目录下文件
void findFiles(char* Path, char* choose[], int argc)
{
    intptr_t judgePath;    //文件句柄，相当与文件指针fp,用于判断是否路径是否存在
    _finddata_t File;

    int i = 1;
    FILE* fp;                        //用于判断是否是统计对象
    char strfind[MAXSIZE];            //用于加通配符，寻找文件
    char str[MAXSIZE];                //用于记录文件路径
    strcpy(strfind, Path);
    strcat(strfind, "\\");
    strcat(strfind, "*.*");        // 在要遍历的目录后加上通配符
    judgePath = _findfirst(strfind, &File);    // 查找目录中的第一个文件
    if (judgePath == -1)
    {
        printf("文件路径错误或不存在\n");
        return;
    }
    do
    {
        if (File.attrib & _A_SUBDIR
            && strcmp(File.name, ".") == 0
            && strcmp(File.name, "..") == 0
            );
        else
        {
            strcpy(str, Path);
            strcat(str, "\\");
            strcat(str, File.name);
            if ((fp = fopen(str, "r")) != NULL)
            {
                printf("%s\n", str);
                for (i = 1; i < argc - 1; i++)
                {
                    if (strcmp(choose[i], "-c") == 0)
                        countchar(str);
                    if (strcmp(choose[i], "-l") == 0)
                        countline(str);
                    if (strcmp(choose[i], "-w") == 0)
                        countword(str);
                }
            }
        }


    } while (_findnext(judgePath, &File) == 0);    // 查找下一个文件

    _findclose(judgePath);    // 关闭句柄
}

int main(int argc, char* argv[])
{
    int i = 1;
    FILE* fp;
    fp = fopen(argv[argc - 1], "r");
    if (fp == NULL)
    {
        findFiles(argv[argc - 1], argv, argc);
    }
    else
    {
        for (i = 1; i < argc - 1; i++)
        {
            if (strcmp(argv[i], "-c") == 0)
                countchar(argv[argc - 1]);
            if (strcmp(argv[i], "-l") == 0)
                countline(argv[argc - 1]);
            if (strcmp(argv[i], "-w") == 0)
                countword(argv[argc - 1]);
            if (strcmp(argv[i], "-a") == 0)
            {
                countSline(argv[argc - 1]);
                countnoteline(argv[argc - 1]);
            }
        }
        fclose(fp);
    }

    return 0;
}