#include stdarg.h#include stdio.hint sum(int, ...);int main () {printf(Sum of 15 and 56 = %d\\n,sum(2, 15, 56) );

编程学习网为您整理以下代码实例，主要实现：C语言库宏va_arg()，希望可以帮到各位朋友。

#include <stdarg.h>
#include <stdio.h>

int sum(int, ...);

int main () {
   printf("Sum of 15 and 56 = %d\n",  sum(2, 15, 56) );
   return 0;
}

int sum(int num_args, ...) {
   int val = 0;
   va_List ap;
   int i;

   va_start(ap, num_args);
   for(i = 0; i < num_args; i++) {
      val += va_arg(ap, int);
   }
   va_end(ap);

   return val;
}