floor.3

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th FLOOR III 5/15/74
.sh NAME
floor, ceil \*- floor and ceiling functions
.sh SYNOPSIS
.br
.ft B
double floor(x)
.br
double x;
.s3
double ceil(x)
.br
double x;
.ft R
.sh DESCRIPTION
The floor function returns the
largest integer (as a double precision number)
not greater than \fBx\fR.
.s3
The ceil function returns the
smallest integer
not less than \fBx\fR.
.sh BUGS