读取文件的所有数据

Question

在C ++中，我尝试使用stdio.h（fopen，getc等）完全读取char，char。 我已经完成了一个程序，它创建一个资源管理器窗口并计算所选文件中的字母（和字节数）。 它似乎适用于.txt文件，但使用其他文件格式它不起作用。有人可以解释为什么以及如何解决它？ 是否可以通过程序确定磁盘上的大小？

3源代码：

主要代码：

#include "OpenFileDialog.h"
#include <stdio.h>
#include <stdlib.h>

int main(void){

    OpenFileDialog* openFileDialog1 = new OpenFileDialog();
    openFileDialog1->FilterIndex = 1;
    openFileDialog1->Flags |= OFN_SHOWHELP;
    openFileDialog1->InitialDir = (TCHAR*)("C:\\Users\\Luca\\Documents");
    openFileDialog1->Title = (TCHAR*)("Open Text File");
    long long int number=0;

    if (openFileDialog1->ShowDialog())
    {
        //MessageBox(0, openFileDialog1->FileName, "File selected",MB_OK | MB_ICONINFORMATION);
    }

    FILE * pFile;
    char c;
    int eofnbr=0;
    int charnbr[256];
    int otherschar=0;
    char messageString1[2000];
    char catString[200];
    memset(charnbr,0,sizeof(messageString1));
    memset(charnbr,0,sizeof(charnbr));
    pFile = fopen(openFileDialog1->FileName,"r");
    if (pFile==NULL){
        return -1;
    }
    else{
        int eofflag=0;
        do{
            do{
                c = getc (pFile);
                if((c>=0)&&(c<=255)){
                    charnbr[c]=charnbr[c]+1;
                }
                else
                    otherschar++;
                if(c==EOF){
                    eofnbr++;
                }
                number++;
            } while (c != EOF);
            eofflag=feof(pFile);
        } while(eofflag==0);    


        fclose (pFile);
        for(int i=0;i<256;i=i+8){
            sprintf(catString,"%d = %d\t%d = %d\t%d = %d\t%d = %d\t%d = %d\t%d = %d\t%d = %d\t%d = %d\n",i,charnbr[i],i+1,charnbr[i+1],i+2,charnbr[i+2],i+3,charnbr[i+3],i+4,charnbr[i+4],i+5,charnbr[i+5],i+6,charnbr[i+6],i+7,charnbr[i+7]);
            strcat(messageString1,catString);
        }
        sprintf(catString,"others = %d\t EOF = %d\t\t%d   Byte\n ",otherschar,eofnbr, number);
        strcat(messageString1,catString);
    }
    MessageBox(0, messageString1, "File selected",MB_OK | MB_ICONINFORMATION);

    return 0;
}

资源管理器功能：

#include "OpenFileDialog.h"

OpenFileDialog::OpenFileDialog(void)
{
    this->DefaultExtension = 0;
    this->FileName = new TCHAR[MAX_PATH];
    this->Filter = 0;
    this->FilterIndex = 0;
    this->Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;
    this->InitialDir = 0;
    this->Owner = 0;
    this->Title = 0;
}

bool OpenFileDialog::ShowDialog()
{
    OPENFILENAME ofn ;

    TCHAR* explorerFolder= this->InitialDir;

    ZeroMemory(&ofn, sizeof(ofn));


    ofn.lStructSize = sizeof(ofn);
    ofn.hwndOwner = this->Owner;
    ofn.lpstrDefExt = this->DefaultExtension;
    ofn.lpstrFile = this->FileName;
    ofn.lpstrFile[0] = '\0';
    //ofn.lpstrFile = explorerFolder;
    ofn.nMaxFile = MAX_PATH;
    ofn.lpstrFilter = this->Filter;
    ofn.nFilterIndex = this->FilterIndex;
    ofn.lpstrInitialDir = explorerFolder;
    //ofn.lpstrInitialDir = NULL;
    ofn.lpstrTitle = this->Title;
    ofn.Flags = this->Flags;

    GetOpenFileName(&ofn);


    if (_tcslen(this->FileName) == 0) return false;

    return true;
}

资源管理器库：

#pragma once

#include <Windows.h>
#include <Commdlg.h>
#include <tchar.h>

class OpenFileDialog
{
public:
    OpenFileDialog(void);

    TCHAR* DefaultExtension;
    TCHAR* FileName;
    TCHAR* Filter;
    int FilterIndex;
    int Flags;
    TCHAR* InitialDir;
    HWND Owner;
    TCHAR* Title;

    bool ShowDialog();
};

Image test with .txt

Image test with .pdf