【C语言】写了一个检测写了多少行C语言代码的小工具，请问哪里写错了？

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

#define MAX 256

long total;

int countLines(const char *filename);
void findAllCodes(const char *path);
void findALLFiles(const char *path);

int countLines(const char *filename)
{
    FILE *fp;
    int count = 0;
    int temp;

    if ((fp = fopen(filename, "r")) == NULL)
    {
        fprintf(stderr, "Can not open the file：%s\n", filename);
        return 0;
    }

    while ((temp = fgetc(fp)) != EOF)
    {
        if (temp == '\n')
        {
            count++;
        }
    }

    fclose(fp);

    return count;
}

void findAllCodes(const char *path)
{
    struct _finddata_t fa;
    long handle;
    char thePath[MAX], target[MAX];

    strcpy(thePath, path);
    if((handle = _findfirst(strcat(thePath, "/*.c"), &fa)) != -1L)
    {
        do
        {
            sprintf(target, "%s%s", path, fa.name);
            total += countLines(target);
        }while (_findnext(handle, &fa) == 0);
    }

    _findclose(handle);
}

void findALLDirs(const char *path)
{
    struct _finddata_t fa;
    long handle;
    char thePath[MAX];

    strcpy(thePath, path);
    if((handle = _findfirst(strcat(thePath, "/*"), &fa)) == -1L)
    {
        fprintf(stderr, "The path %s is wrong!\n",path);
        return;
    }

    do
    {
        if (!strcmp(fa.name, ".") || !strcmp(fa.name, ".."))
            continue;

        if( fa.attrib == _A_SUBDIR)
        {
            sprintf(thePath, "%s%s", path, fa.name);
            findAllCodes(thePath);
            findALLDirs(thePath);
        }
    }while (_findnext(handle, &fa) == 0);

    _findclose(handle);
}

int main()
{
    char path[MAX] = ".";

    printf("计算中...\n");

    findAllCodes(path);
    findALLDirs(path);

    printf("目前你总共写了 %ld 行代码！\n\n", total);
    system("pause");

    return 0;
}

sprintf(target, "%s%s", path, fa.name);少了分隔符/，你改为sprintf(target, "%s/%s", path, fa.name);试试