Write and test a big program in small pieces.

将一个大块的程序分解成几个小部分进行编写和测试。

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Don't write a program to test a program!

不要写一个程序来测试程序！

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Write a program to read in a whole number and test if it is a prime.

写一程序：读入一整数并检验它是否是质数。

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Write a program to read in a whole number and test if it is a prime.

写一程序：读入一整数并检验它是否是质数。

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