求C++代码
怎么从一个文件中按规定的字节读取数据然后写入新的数据里。
例如：1.txt为10kB,把5KB写入1.1txt，5KB写入1.2txt
求关键代码 。。。
[解决办法]

#include <iostream>
#include <fstream>
#include <string>

#define BUFFER_SIZE 1024

using namespace std;

int main(int argc, char *argv[])
{
    ifstream ifs("1.txt", ios::in);
    ofstream ofs1("1_1.txt", ios::app);
    ofstream ofs2("1_2.txt", ios::app);

    char buffer[BUFFER_SIZE];
    
    for (int i = 0; i < 5; ++i)
    {
        ifs.read(buffer, BUFFER_SIZE);
        ofs1.write(buffer, BUFFER_SIZE);
    }

    for (int i = 0; i < 5; ++i)
    {
        ifs.read(buffer, BUFFER_SIZE);
        ofs2.write(buffer, BUFFER_SIZE);
    }

    return 0;
}

[解决办法]
提醒：
不要把
fopen("...","...");fscanf,fprintf,fclose //读时把\r\n替换成\n，写时把\n替换成\r\n;读到\x1a就设置EOF;读写的内容当字符看待
和
fopen("...","...b");fread,fwrite,fclose //不作以上替换，遇到\x1a仍继续读;读写的内容当字节看待
弄混了

[解决办法]

引用:

引用:C/C++ code
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#include <iostream> #include <fstream> #include <string> #define BUFFER_SIZE 1024 using ……

#include <iostream>
#include <fstream>
#include <string>
 
#define BUFFER_SIZE 1024
 
using namespace std;
 
int main(int argc, char *argv[])
{
    ifstream ifs("1.txt", ios::in);
    ofstream ofs1("1_1.txt", ios::app);
    ofstream ofs2("1_2.txt", ios::app);
 
    char buffer[BUFFER_SIZE];
    int i = 0;
    for (i = 0; i < 5; ++i)
    {
        ifs.read(buffer, BUFFER_SIZE);
        ofs1.write(buffer, BUFFER_SIZE);
    }
 
    for (i = 0; i < 5; ++i)
    {
        ifs.read(buffer, BUFFER_SIZE);
        ofs2.write(buffer, BUFFER_SIZE);
    }
 
    return 0;
}

你什么编译器啊？