问题：
This question already has an answer here: 这个问题已经在这里有了答案：
I need to read a whole file into memory and place it in a C++ std::string . 我需要将整个文件读入内存并将其放在C ++ std::string 。
If I were to read it into a char[] , the answer would be very simple: 如果我将其读入char[] ，答案将非常简单：
std::ifstream t;
int length;
t.open("file.txt"); // open input file
t.seekg(0, std::ios::end); // go to the end
length = t.tellg(); // report location (this is the length)
t.seekg(0, std::ios::beg); // go back to the beginning
buffer = new char[length]; // allocate memory for a buffer of appropriate dimension
t.read(buffer, length); // read the whole file into the buffer
t.close(); // close file handle
// ... Do stuff with buffer here ...
Now, I want to do the exact same thing, but using a std::string instead of a char[] . 现在，我想做完全相同的事情，但是使用std::string而不是char[] 。 I want to avoid loops, ie I don't want to: 我想避免环路，即我不想 ：
std::ifstream t;
t.open("file.txt");
std::string buffer;
std::string line;
while(t){
std::getline(t, line);
// ... Append line to buffer and go on
}
t.close()
Any ideas? 有任何想法吗？
解决方案：
参考一： https://stackoom.com/question/Autx/将整个ASCII文件读入C-std-string-重复参考二： https://oldbug.net/q/Autx/Read-whole-ASCII-file-into-C-std-string-duplicate
来源：oschina
链接：https://my.oschina.net/u/4438370/blog/4283739