atof(3)
NAME
atof, atoi, atol − convert ASCII to numbers
SYNTAX
double atof(nptr)
char *nptr;
atoi(nptr)
char *nptr;
long atol(nptr)
char *nptr;
DESCRIPTION
The atof subroutine recognizes an optional string of tabs and 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.
The atoi and atol subroutines recognize an optional string of tabs and spaces, then an optional sign, then a string of digits. These functions convert a string pointed to by nptr to floating integer, and long integer representation respectively. The first unrecognized character ends the string.
RESTRICTIONS
There are no provisions for overflow.