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| [9] | 1 | .\" @(#)atof.3 6.1 (Berkeley) 5/15/85
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| 2 | .\"
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| 3 | .TH ATOF 3 "May 15, 1985"
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| 4 | .AT 3
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| 5 | .SH NAME
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| 6 | atof, atoi, atol \- convert ASCII to numbers
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| 7 | .SH SYNOPSIS
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| 8 | .nf
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| 9 | .ft B
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| 10 | #include <stdlib.h>
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| 11 |
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| 12 | double atof(const char *\fInptr\fP)
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| 13 | int atoi(const char *\fInptr\fP)
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| 14 | long atol(const char *\fInptr\fP)
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| 15 | .ft R
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| 16 | .fi
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| 17 | .SH DESCRIPTION
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| 18 | These functions convert a string pointed to by
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| 19 | .I nptr
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| 20 | to floating, integer, and long integer representation respectively.
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| 21 | The first unrecognized character ends the string.
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| 22 | .PP
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| 23 | .B Atof
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| 24 | recognizes an optional string of spaces, then an optional sign, then
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| 25 | a string of digits optionally containing a decimal
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| 26 | point, then an optional `e' or `E' followed by an optionally signed integer.
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| 27 | .PP
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| 28 | .B Atoi
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| 29 | and
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| 30 | .B atol
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| 31 | recognize an optional string of spaces, then an optional sign, then a
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| 32 | string of
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| 33 | digits.
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| 34 | .SH SEE ALSO
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| 35 | .BR strtol (3),
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| 36 | .BR strtod (3),
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| 37 | .BR scanf (3).
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| 38 | .SH BUGS
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| 39 | There are no provisions for overflow.
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