2009-12-24 21:22:41 +01:00
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.TH NEARBYINT 3 "December 18, 2009"
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.UC 4
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.SH NAME
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2009-12-30 21:35:05 +01:00
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nearbyint, ceil, floor, trunc \- floating point rounding
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2009-12-24 21:22:41 +01:00
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.SH SYNOPSIS
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.nf
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.ft B
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#include <math.h>
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double ceil(double \fIx\fP);
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double floor(double \fIx\fP);
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double nearbyint(double \fIx\fP);
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double trunc(double \fIx\fP);
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.fi
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.SH DESCRIPTION
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These functions round the specified floating point number to a nearby integer.
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For nearbyint, the rounding mode is determined by the value set using the
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fesetround function. The other functions are not influenced by the rounding
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mode. The ceil function rounds upwards, selecting the smallest integer that is
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larger than or equal to \fIx\fP. The floor function rounds downwards, selecting
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the largest integer that is smaller than or equal to \fIx\fP. The trunc function
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rounds towards zero, selecting the largest integer with the largest absolute
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value of which the absolute value is smaller than or equal to the absolute
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value of \fIx\fP.
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.SH "RETURN VALUE"
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The functions return an integer close to \fIx\fP.
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.SH "SEE ALSO"
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fesetround(3)
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