projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| 2 | .\" | |
| 93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
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4 | .\" Permission is granted to make and distribute verbatim copies of this |
| 5 | .\" manual provided the copyright notice and this permission notice are | |
| 6 | .\" preserved on all copies. | |
| 7 | .\" | |
| 8 | .\" Permission is granted to copy and distribute modified versions of this | |
| 9 | .\" manual under the conditions for verbatim copying, provided that the | |
| 10 | .\" entire resulting derived work is distributed under the terms of a | |
| 11 | .\" permission notice identical to this one. | |
| c13182ef | 12 | .\" |
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13 | .\" Since the Linux kernel and libraries are constantly changing, this |
| 14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 15 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 16 | .\" the use of the information contained herein. The author(s) may not | |
| 17 | .\" have taken the same level of care in the production of this manual, | |
| 18 | .\" which is licensed free of charge, as they might when working | |
| 19 | .\" professionally. | |
| c13182ef | 20 | .\" |
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21 | .\" Formatted or processed versions of this manual, if unaccompanied by |
| 22 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 4b72fb64 | 23 | .\" %%%LICENSE_END |
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24 | .\" |
| 25 | .\" References consulted: | |
| 26 | .\" Linux libc source code | |
| 27 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
| 28 | .\" 386BSD man pages | |
| 29 | .\" Modified Mon Mar 29 22:39:24 1993, David Metcalfe | |
| 30 | .\" Modified Sat Jul 24 21:39:22 1993, Rik Faith (faith@cs.unc.edu) | |
| fe0fefbf | 31 | .TH ATOF 3 2015-03-02 "GNU" "Linux Programmer's Manual" |
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32 | .SH NAME |
| 33 | atof \- convert a string to a double | |
| 34 | .SH SYNOPSIS | |
| 35 | .nf | |
| 36 | .B #include <stdlib.h> | |
| 37 | .sp | |
| 38 | .BI "double atof(const char *" nptr ); | |
| 39 | .fi | |
| 40 | .SH DESCRIPTION | |
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41 | The |
| 42 | .BR atof () | |
| 43 | function converts the initial portion of the string | |
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44 | pointed to by \fInptr\fP to |
| 45 | .IR double . | |
| d9bfdb9c | 46 | The behavior is the same as |
| fea681da | 47 | .sp |
| 2147452b | 48 | .in +4n |
| 13f78d96 | 49 | strtod(nptr, NULL); |
| 2147452b | 50 | .in |
| fea681da | 51 | .sp |
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52 | except that |
| 53 | .BR atof () | |
| 54 | does not detect errors. | |
| 47297adb | 55 | .SH RETURN VALUE |
| fea681da | 56 | The converted value. |
| b5dedda7 | 57 | .SH ATTRIBUTES |
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58 | For an explanation of the terms used in this section, see |
| 59 | .BR attributes (7). | |
| 60 | .TS | |
| 61 | allbox; | |
| 62 | lb lb lb | |
| 63 | l l l. | |
| 64 | Interface Attribute Value | |
| 65 | T{ | |
| b5dedda7 | 66 | .BR atof () |
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67 | T} Thread safety MT-Safe locale |
| 68 | .TE | |
| 47297adb | 69 | .SH CONFORMING TO |
| 68e1685c | 70 | SVr4, POSIX.1-2001, 4.3BSD, C89, C99. |
| 47297adb | 71 | .SH SEE ALSO |
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72 | .BR atoi (3), |
| 73 | .BR atol (3), | |
| 74 | .BR strtod (3), | |
| 75 | .BR strtol (3), | |
| 76 | .BR strtoul (3) |