hello,world !

“Hello, world"程序是指在计算机屏幕上输出“Hello,world”这行字符串的计算机程序,“hello, world”的中文意思是“你好,世界。”。这个例程在Brian Kernighan 和Dennis M. Ritchie合著的《The C Programme Language》使用而广泛流行。因为它的简洁,实用,并包含了一个该版本的C程序首次出现在1974年Brian Kernighan所撰写的《Programming in C: A Tutorial》


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printf("hello, world\n");

实际上将“Hello”和“World”一起使用的程序最早出现于1972年,出现在贝尔实验室成员Brian Kernighan撰写的内部技术文件《Introduction to the Language B》之中:

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main(){
extern a,b,c; putchar(a);putchar(b);putchar(c);putchar('!*n'); }
a'hell';
b'o,w';
c'orld';

最初的”hello, world”打印内容有个标准,即全小写,有逗号,逗号后空一格,且无感叹号。不过沿用至今,完全遵循传统标准形式的反而很少出现。

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