Before revision: Zero as a prefix A prefix 0 is used in C to specify string representations of octal numbers, as required by the ANSI C standard for the strtol() function ( the string to long integer converter ) in the <stdlib.h> library.
After revision: Zero as a prefix A prefix 0 is used in C to specify string representations of octal numbers, as required by the ANSI C standard for the strtol() function ( which converts strings to long integers ) in the <stdlib.h> library.