/ ************************************************************************ * * Purpose: To show ... in action. This operator (?) allows us to pass * a variable number of parameters to a function, 'printf' * uses ... * Author: M.J. Leslie * Date: 09-Jul-94 * ************************************************************************/ #include <stdio.h> #include <stdarg.h> /* va_list, va_arg, va_end */ int set(char *item, int, num, ...); /************************************************************************/ main() { char *item="pear"; (set (item,4, "apple", "pear", "banana", "grape") ) ? printf ("%s found\n", item) : printf("%s not found\n", item); } /************************************************************************/ int set(char *item, int num, ...) { va_list ap; /* define 'ap' It acts as a pointer * to the undefined variables. */ int ok=0; int inc=0; va_start(ap, num); /* seed 'ap' */ do { if ( item == va_arg(ap, char *)) ok=1; } while ( ok==0 && ++inc < num); va_end(ap); /* tidy up. */ return (ok); }
file: /Techref/language/ccpp/Cref/EXAMPLES/varlist.c, 1KB, , updated: 1997/4/21 08:52, local time: 2024/12/4 19:38,
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