C ++返回字符串不断变得垃圾(C++ return string keeps getting junk)

 为什么这里的返回字符串上有各种各样的垃圾？ 
 
string getChunk(ifstream &in){
char buffer[5];
for(int x = 0; x < 5; x++){
    buffer[x] = in.get();
    cout << x << " " << buffer[x] << endl;
}
cout << buffer << endl;
return buffer;
}

ifstream openFile;
openFile.open ("Bacon.txt");
chunk = getChunk(openFile);
cout << chunk;
 
 虽然我的调试说我的缓冲区正在填充正确的字符，但我在字符串中得到了一堆垃圾，它的末尾有垃圾。 
 
 谢谢，c ++比Java困难得多。 

Why does the return string here have all sorts of junk on it?
 
string getChunk(ifstream &in){
char buffer[5];
for(int x = 0; x < 5; x++){
    buffer[x] = in.get();
    cout << x << " " << buffer[x] << endl;
}
cout << buffer << endl;
return buffer;
}

ifstream openFile;
openFile.open ("Bacon.txt");
chunk = getChunk(openFile);
cout << chunk;
 
I get a load of junk in the string where it has junk on the end of it, even though my debug says that my buffer is being filled with the correct characters.
 
Thanks, c++ is a lot harder than Java.

原文：https://stackoverflow.com/questions/15890891