代码编译有关问题

#include <stdio.h>
#include <windows.h>

int nCounter = 0;
FILE *fp;
bool FilterChar(char *pChar)
{
    for(int i=0;i<31;i++)
        if(*pChar == "\n\r<>,/?\\{}[]();:\'\" =%^*#!`~+\0&\t"[i]) return true;
    return false;
}

bool IsGoodEmail(char *pEmail)
{
    int a = strcspn(pEmail, "@"), b = strcspn(pEmail,"."), c = strlen(pEmail)-1;

    if(pEmail[0] == '@' || (a+1) == b) return false;
    if(!IsCharAlpha(pEmail[c])) pEmail[c] = '\0';
    
    if((a < c) && (b > a) && (b < c)) return true;
    
    return false;
}

bool IsValidFile(char *pFile)
{
    int x = 0;
    int nStrLen = lstrlen(pFile);
    char *pExt  = new char[nStrLen]; ZeroMemory(pExt,nStrLen);
    bool bRet   = false;

    for(int i = nStrLen;i>0;i--){
        if(pFile[i] == '.'){
            while(i<nStrLen){
                pExt[x] = pFile[i];
                x++;i++;
            } break;
        }
    }
    
    if(!lstrcmp(pExt,".txt") || !lstrcmp(pExt,".htm") || !lstrcmp(pExt,".html") || !lstrcmp(pExt,".cpp") || !lstrcmp(pExt,".h") || !lstrcmp(pExt,".php")) bRet = true;
    delete pExt; pExt = NULL;

    return bRet;
}

void ScanFile(char *lpszFile)
{
    if(IsValidFile(lpszFile)) SetConsoleTitle(lpszFile);
    else return;

    HANDLE hFile = CreateFile(lpszFile,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
    if(hFile != NULL || hFile != INVALID_HANDLE_VALUE)
    {
        DWORD dwFileSize = GetFileSize(hFile,NULL);
        if(dwFileSize != INVALID_FILE_SIZE)
        {
            char *lpszFileBuffer = new char[dwFileSize]; ZeroMemory(lpszFileBuffer,dwFileSize);

            DWORD dwRet = 0;
            ReadFile(hFile,lpszFileBuffer,dwFileSize,&dwRet,NULL);

            char *pEmail = new char[MAX_PATH]; ZeroMemory(pEmail,MAX_PATH);
            char *pData = lpszFileBuffer;
            unsigned int c = 0;
            do{
                if(*pData == '@'){
                    while(!FilterChar(pData)) *pData--;
                    *pData++;
                    while(!FilterChar(pData)){
                        if(c < MAX_PATH-1){
                            pEmail[c] = *pData;
                            c++; *pData++;
                        } else break;
                    }
                    if(IsGoodEmail(pEmail)){ printf("%s\n",pEmail); fprintf(fp,"%s\n",pEmail);nCounter++;    }                    
                    ZeroMemory(pEmail,MAX_PATH); c = 0;
                }
            }while(*pData++);
            
            pData = NULL;
            delete lpszFileBuffer;
            CloseHandle(hFile);
        }
        CloseHandle(hFile);
    }
}

static bool ScanDirectory(char *lpszDirectory,DWORD dwSize)
{
    HANDLE hFind;
    WIN32_FIND_DATA *fd = new WIN32_FIND_DATA; ZeroMemory(fd,sizeof(WIN32_FIND_DATA));
    
    char * lpszBuffer;

    DWORD dwNewSize       = 0;
    bool bStatus       = true;
    
    DWORD dwActualSize = dwSize+3;
    char * lpszScanDir = new char[dwActualSize]; ZeroMemory(lpszScanDir,dwActualSize);

    wsprintf(lpszScanDir,"%s\\*",lpszDirectory);

    hFind = FindFirstFile(lpszScanDir,fd);
    if(hFind != INVALID_HANDLE_VALUE)
    {
        do{
            if(fd->cFileName[0] != '.'){
                dwNewSize  = (dwSize + lstrlen(fd->cFileName) + 3);
                lpszBuffer = new char[dwNewSize]; ZeroMemory(lpszBuffer,dwNewSize);

                wsprintf(lpszBuffer,"%s\\%s",lpszDirectory,fd->cFileName);
                if(!ScanDirectory(lpszBuffer,dwNewSize)) ScanFile(lpszBuffer);
                delete lpszBuffer;
            }
        } while(FindNextFile(hFind,fd));
    } else bStatus = false;

    FindClose(hFind);
    delete fd,lpszBuffer,lpszScanDir;

    return bStatus;
}

int main(int argc,char **argv)
{
    char *lpszScanDir = new char[MAX_PATH]; ZeroMemory(lpszScanDir,MAX_PATH);
    char *savefile="d:\\邮件.txt";//保存文件目录
    fp=fopen(savefile,"a");
    SetConsoleTitle("Email Scanner v1.0 - By Smith");
    printf("Email scanner v1.0\nBy Smith\n\nEnter directory to scan\nExample \"c:\" (without quotes)\n\n> ");
        
    scanf("%s",lpszScanDir);
    ScanDirectory(lpszScanDir,lstrlen(lpszScanDir));
    delete lpszScanDir;

    SetConsoleTitle("Email Scanner v1.0 - By Smith");
    printf("\nTotal emails found: %d ,save in file %s.\nPress escape to exit...",nCounter,savefile);
    fprintf(fp,"\nTotal emails found: %d\nPress escape to exit...",nCounter);
    while(!GetAsyncKeyState(VK_ESCAPE)) Sleep(10);    
    fclose(fp);

    return 0;
}