ATOF

Section: C Library Functions (3)
Updated: May 15, 1985
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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 containing 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.

BUGS

There are no provisions for overflow.