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Which is the best way to write a quine program?
Aim of this guide is to show how to write a program that outputs its own source code with no input. This family of programs is called Quine. Why is this interesting? Well, because self-referencing stuff tends to be always interesting 🙂 There are many ways to build such programs, but the most common way is called constructive method.
How to write your first Quine program in Python?
Luckily we now know that Python provides the repr () function to return an evaluable version of a string and for the break line we can just add an escaped : And here it is your first Quine program in Python, since there is no input and the output is exactly the source code of the program!
Who was the Quine computer program named after?
Quines are named after the American mathematician and logician Willard Van Orman Quine (1908–2000). The interesting thing is you are not allowed to use open and then print file of the program. To the best of our knowledge, below is the shortest quine in C.
Is the Quine a self reproducing program?
Quine – A self-reproducing program. A quine is a program which prints a copy of its own as the only output. A quine takes no input.
Which is an example of a quine relay?
A Quine-relay is a program written in a language that outputs a program in another language that generates in turn the starting program. A visual example is given by the featured image of this article. Also you can find here a practical example of a Quine-relays for 128 programming languages!
Which is the data part of a quine?
In this linguistic analogy, the verb “to quine”, plays the role of the code, and “quine” in quotation marks plays the role of the data. We will henceforth use the words “code” and “data” a lot, to designate the code and data parts of the quine as just explained.
What is the meaning of the verb Quine?
This idea is summarized by the sentence “quine ‘quine’”. Here, the verb to quine (invented by Douglas R. Hofstadter) means “to write (a sentence fragment) a first time, and then to write it a second time, but with quotation marks around it” (for example, if we quine “say”, we get “say ‘say’”).
Which is the correct definition of a quine?
The standard terms for these programs in the computability theory and computer science literature are “self-replicating programs”, “self-reproducing programs”, and “self-copying programs”. A quine is a fixed point of an execution environment, when the execution environment is viewed as a function transforming programs into their outputs.
How is the usual way to code a quine?
The usual way to code a quine works similarly to this paradox: The program consists of two identical parts, once as plain code and once quoted in some way (for example, as a character string, or a literal data structure).
Which is the only output of a quine?
A quine is a program which prints a copy of its own as the only output. A quine takes no input. Quines are named after the American mathematician and logician Willard Van Orman Quine (1908–2000). The interesting thing is you are not allowed to use open and then print file of the program.
Which is the shortest Quine program in C?
To the best of our knowledge, below is the shortest quine in C. This program uses the printf function without including its corresponding header (#include ), which can result in undefined behavior. Also, the return type declaration for main has been left off to reduce the length of the program.