Variable number of arguments can be managed by using the functions va_arg( ), va_start( ) and va_end( ). The first argument of all these functions is a pointer to a list which is typedefd as va_list. The following program demonstrates how to define a function which can accept variable number of arguments. We can pass variable number of strings to the function messages( ) which prints all the strings.
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
void messages ( char *msg, … )
{
int total = 0 ;
va_list lptr ;
char arg[80] = ” ” ;
va_start ( lptr, msg ) ;
puts ( msg ) ;
while ( strcmp ( arg, “” ) )
{
strcpy ( arg, va_arg ( lptr, char * ) ) ;
puts ( arg ) ;
}
va_end ( lptr ) ;
}
main( )
{
messages( “Hello”, “Hi”, “Fine”, “Thankyou” ) ;
}
