爲什麼ofstream :: get（）和put（）會導致信息丟失？

Question

我的功能是copy2，我在cplusplus.com上找到了功能copy1，我用的是copy2並且有問題，但是拷貝1沒問題，copy2導致關於測試文件mp3的atist，title，...的損失信息，我不明白爲什麼？

#include <fstream> 
#include <iostream> 
using namespace std; 

void copy1() 
{ 
    char * buffer; 
    long size; 

    ifstream infile ("Test.mp3",ifstream::binary); 
    ofstream outfile ("Test2.mp3",ofstream::binary); 

    // get size of file 
    infile.seekg(0,ifstream::end); 
    size=infile.tellg(); 
    infile.seekg(0); 

    // allocate memory for file content 
    buffer = new char [size]; 

    // read content of infile 
    infile.read (buffer,size); 

    // write to outfile 
    outfile.write (buffer,size); 

    // release dynamically-allocated memory 
    delete[] buffer; 
    cout<<"xong"; 
    outfile.close(); 
    infile.close(); 
    return ; 
} 
void copy2(){ 
    ifstream infile ("Test.mp3",ios::binary); 
    ofstream outfile ("Test1.mp3",ios::binary); 
    char c; 
    while(!infile.eof()) 
    { 
    infile.get(c); 
    outfile.put(c); 
    } 
} 
int main() { 
    copy2(); 
} 

Answer 1

你while(!infile.eof())會引起麻煩，因爲它可以返回在一定條件下錯誤的結果。 我有類似的問題。嘗試使用像這樣的東西：

while (getline(infile,data))           
    {           
      cout<<data<<endl; 
    }