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BSD 2.11 - man page for atof (bsd section 3)

ATOF(3) 				       Library Functions Manual 				      ATOF(3)

NAME
atof, atoi, atol - convert ASCII to numbers
SYNOPSIS
double atof(nptr) char *nptr; atoi(nptr) char *nptr; long atol(nptr) char *nptr;
DESCRIPTION
These functions convert a string pointed to by nptr to floating, integer, and long integer representation respectively. The first unrecognized character ends the string. Atof recognizes an optional string of spaces, then an optional sign, then a string of digits optionally con- taining a decimal point, then an optional `e' or `E' followed by an optionally signed integer. Atoi and atol recognize an optional string of spaces, then an optional sign, then a string of digits.
SEE ALSO
scanf(3S)
BUGS
There are no provisions for overflow. 7th Edition May 15, 1985 ATOF(3)
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