看到百度百科这么一句话，顿时没有任何语言了。

#include <iostream>
#include <fstream>
#include <windows.h>
#include <stdio.h>
using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
    int sum;
    char file[1024];
    ifstream in;
    in.open("1.exe",ios::binary);
    in.seekg(0,ios::end);
    sum=in.tellg();
    char* file1=new char[sum];
    cout<<"文件大小："<<sum<<"字节"<<endl;
//------------------一次读入1024字符------------------
    in.seekg(0,ios::beg);
    DWORD start_time1=GetTickCount();//计时开始
    for(unsigned int i=0;i<sum/1024;i++)
    {
        in.read(file,1024);
        for(int s=0;s<1024;s++)file1[i*1024+s]=file[s];
    }
    if(sum%1024)
    {
        in.read(file,1024);
        for(int s=0;s<sum%1024;s++)file1[sum-1024+s]=file[s];
    }
    DWORD end_time1=GetTickCount();//计时结束
    cout<<"C++文件流每次读1024字符失去毫秒:"<<(end_time1-start_time1)<<"ms!"<<endl;
//------------------一个一个的读------------------
    in.seekg(0,ios::beg);
    DWORD start_time2=GetTickCount();//计时开始
    for(unsigned int i=0;i<sum;i++)
    {
        in.get(file1[i]);
    }
    DWORD end_time2=GetTickCount();//计时结束
    cout<<"C++文件流每次读1个字符失去毫秒:"<<(end_time2-start_time2)<<"ms!"<<endl;

//------------------fopen读------------------
    FILE* f=fopen("1.exe","rb+");
    DWORD start_time3=GetTickCount();//计时开始
    for(unsigned int i=0;i<sum/1024;i++)
    {
        fread(&file,sizeof(char),1024,f);
        for(int s=0;s<1024;s++)file1[i*1024+s]=file[s];
    }
    if(sum%1024)
    {
        fread(&file,sizeof(char),1024,f);
        for(int s=0;s<sum%1024;s++)file1[sum-1024+s]=file[s];
    }
    DWORD end_time3=GetTickCount();//计时结束
    cout<<"C文件流每次读入1024个字符失去毫秒:"<<(end_time3-start_time3)<<"ms!"<<endl;


    delete []file1;
    in.close();
    fclose(f);
    cin.get();
    return 0;
}