atof, atoi, atol \- convert ASCII to numbers
These functions convert a string pointed to by
to floating, integer, and long integer
representation respectively.
The first unrecognized character ends the string.
recoginizes 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.
recognize an optional string of tabs and spaces,
then an optional sign, then a string of
There are no provisions for overflow.