使用可变参数，实现函数，求函数参数的最大值

#include<stdio.h>
#include<stdlib.h>
#include<stdarg.h>
#pragma warning(disable:4996)
int avg(int num, ...)
{
va_list arg;
va_start(arg,num);
int max = va_arg(arg,int);
while (num--)
{
int n = va_arg(arg,int);
if (max < n);
}
va_end(arg);
return max;
}
int main()
{
printf("max=%d\n",avg(3,4,2,3));
system("pause");
return 0;
}