自我再现程序 [英] Self-reproducing program
问题描述
我质疑我在Accelerated C ++中的最后一个练习的解决方案:
I am questioning my solution to the last exercise in Accelerated C++:
编写自动再现程序。这样的程序是没有输入的程序,并且当运行时,在标准输出流上写入其自己的源文本的副本。
Write a self-reproducing program. Such a program is one that does no input, and that, when run, writes a copy of its own source text on the standard output stream.
我的解决方案:
using std::string;
using std::cout;
using std::endl;
using std::ifstream;
using std::getline;
void selfReproduce16_1()
{
ifstream thisFile("C:\\Users\\Kevin\\Documents\\NetBeansProjects\\Accelerated_C++_Exercises\\Chapter_16.cpp", ifstream::in);
string curLine;
bool foundHeader = false;
while(getline(thisFile, curLine))
{
if(!curLine.compare("void selfReproduce16_1()") || foundHeader)
{
foundHeader = true;
cout << curLine << endl;
}
}
}
这只打印出解决方案的源文本(此函数)。这是他们想到的解决方案吗?
This only prints out the source text of the solution (this function). Is this the solution that they had in mind?
我想要一个动态解决方案,不需要硬编码源文件的位置。但是,我不知道在运行时自动获取源文件的位置的方法。
I would like a dynamic solution that does not require hard-coding the location of the source file. However, I am not aware of a way to get the location of a source file automatically during runtime.
与此相关的另一点是包含包含文件,并且(遇到函数调用时)自动获取函数所在的源文件的位置对我来说,这将是一个真正的自我再现程序。
Another point related to that is the inclusion of "included" files, and (when encountering a function call), automatically obtaining the location of the source file that the function is stored in. To me, this would be a true "self-reproducing" program.
这是可能在C ++?如果是,如何?
Is this possible in C++? If so, how?
推荐答案
打印出来的程序称为 Quine 。
我认为你的解决方案不会被视为有效:quines通常不允许读取文件(也不能获得任何其他类型的输入)。可以写一个Quine C ++程序,这里你可以找到很多种语言的quine实现。
I think your solution wouldn't be considered valid: quines usually aren't allowed to read files (nor to get any other kind of input). It's possible to writ a Quine C++ program, here you could find many quine implementations in several languages.
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