B语言是一种通用的程序设计语言。自从被C语言取代之后,它几乎已遭弃置。B语言大约是于1969年时由美国贝尔实验室的电脑科学家肯·汤普森在丹尼斯·利奇的支持下设计出来的。后来,丹尼斯·利奇以B语言为基础开发出C语言,目前世界上最常用的程式语言之一。
这是肯·汤普森提供的一个代源码:
/* The following function will print a non-negative number, n, to
the base b, where 2<=b<=10, This routine uses the fact that
in the ASCII character set, the digits 0 to 9 have sequential
code values. */
printn(n,b) {
extrn putchar;
auto a;
if(a=n/b) /* assignment, not test for equality */
printn(a, b); /* recursive */
putchar(n%b + '0');
}
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