c++如何读入二进制文件,然后输出

我在网上找的读取二进制文件,都要求知道文件的格式,是字符串还是结构体.
但我不知道,我也不需要解码,只要二进制数就行了.
我是这样读的

ifstream fin(filepath, ios::binary);
char szBuf[2048] = { 0 };
while (fin.read(szBuf, sizeof(szBuf) )) {

    cout << "str = " << szBuf << std::endl;
    }

一次读2048个,不过读进来的是乱码

我想要1000001这样的二进制数,方便做位运算,怎么才能做到?

来个野路子，不保证安全

#include <bitset>
#include <fstream>
#include <iostream>

auto main() -> int
{
    std::ifstream fin("stu2.txt", std::ios::binary);
    char szBuf[4] = {0};
    while (fin.read(szBuf, sizeof(szBuf) - 1))
    {
        std::cout << "str = " << szBuf << std::endl;
        const int k = sizeof(szBuf) * 8;
        std::bitset<k> temp;
        memcpy(&temp, szBuf, strlen(szBuf));
        std::cout << temp << std::endl;
        memset(szBuf, 0, sizeof(szBuf));
    }
    if (fin.eof())
    {
        std::cout << "str = " << szBuf << std::endl;
        const int k = sizeof(szBuf) * 8;
        std::bitset<k> temp;
        memcpy(&temp, szBuf, strlen(szBuf));
        std::cout << temp << std::endl;
        memset(szBuf, 0, sizeof(szBuf));
    }
    return 0;
}

 

仅供参考：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
int main() {
    int i,v;
    char bs[33];
    char b[33];
    char hs[9];
    char h[9];
    char s[4];
    char *e;

// 十进制整数转二进制串；
    i=1024;
    ltoa(i,b,2);
    sprintf(bs,"%032s",b);
    printf("i=%d,bs=%s\n",i,bs);
// 十进制整数转十六进制串；
    i=1024;
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("i=%d,hs=%s\n",i,hs);
// 十六进制字符串转成十进制数
    strcpy(hs,"00000400");
    sscanf(hs,"%x",&i);
    printf("hs=%s,i=%d\n",hs,i);
// 二进制字符串转化为十六进制字符串；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    ltoa(i,h,16);
    sprintf(hs,"%08s",h);
    printf("bs=%s,hs=%s\n",bs,hs);
// 二进制字符串转化为十进制数；
    strcpy(bs,"00000000000000000000010000000000");
    i=strtol(bs,&e,2);
    printf("bs=%s,i=%d\n",bs,i);
// 十六进制字符串转成二进制串
    strcpy(hs,"00000400");
    sscanf(hs,"%x",&i);
    ltoa(i,b,2);
    sprintf(bs,"%032s",b);
    printf("hs=%s,bs=%s\n",hs,bs);
// ASC\GBK字符串转十六进制串
    strcpy(s,"a汉");
    i=0;
    while (1) {
        if (0==s[i]) break;
        sprintf(hs+i*2,"%02X",(unsigned char)s[i]);
        i++;
    }
    setlocale(LC_ALL,"chs");
    printf("s=%s,hs=%s\n",s,hs);
// 十六进制字符串转成汉字（GBK）及字符(ASC)
    strcpy(hs,"61BABA");
    i=0;
    while (1) {
        if (1!=sscanf(hs+i*2,"%2x",&v)) break;
        s[i]=(char)v;
        i++;
    }
    s[i]=0;
    printf("hs=%s,s=%s\n",hs,s);

    return 0;

}
//i=1024,bs=00000000000000000000010000000000
//i=1024,hs=00000400
//hs=00000400,i=1024
//bs=00000000000000000000010000000000,hs=00000400
//bs=00000000000000000000010000000000,i=1024
//hs=00000400,bs=00000000000000000000010000000000
//s=a汉,hs=61BABA
//hs=61BABA,s=a汉