| 1 | .TH ATOF 3 |
| 2 | .SH NAME |
| 3 | atof, atoi, atol \- convert ASCII to numbers |
| 4 | .SH SYNOPSIS |
| 5 | .B double atof(nptr) |
| 6 | .br |
| 7 | .B char *nptr; |
| 8 | .PP |
| 9 | .B atoi(nptr) |
| 10 | .br |
| 11 | .B char *nptr; |
| 12 | .PP |
| 13 | .B long atol(nptr) |
| 14 | .br |
| 15 | .B char *nptr; |
| 16 | .SH DESCRIPTION |
| 17 | These functions convert a string pointed to by |
| 18 | .I nptr |
| 19 | to floating, integer, and long integer |
| 20 | representation respectively. |
| 21 | The first unrecognized character ends the string. |
| 22 | .PP |
| 23 | .I Atof |
| 24 | recoginizes an optional string of tabs and spaces, |
| 25 | then an optional sign, then |
| 26 | a string of digits optionally containing a decimal |
| 27 | point, then an optional `e' or `E' followed |
| 28 | by an optionally signed integer. |
| 29 | .PP |
| 30 | .I Atoi |
| 31 | and |
| 32 | .I atol |
| 33 | recognize an optional string of tabs and spaces, |
| 34 | then an optional sign, then a string of |
| 35 | digits. |
| 36 | .SH SEE ALSO |
| 37 | scanf(3) |
| 38 | .SH BUGS |
| 39 | There are no provisions for overflow. |