可变参数的理解

#include <stdio.h>
#include <stdlib.h>

#define __va_rounded_size(TYPE)  \
  (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))

void test(int a, int b){
        printf("a address is %x\n", &a);
        printf("b address is %x\n", &b);

        char* addr = (char*)&b ;
        printf("b values is %d\n", *(int*)addr);

        addr = addr + sizeof(int);  //这里如果是long, 那么a的值是0，但没报错
        printf("a values is %d\n", *(int*)addr);
}

int main(){
        test(1,2);
        return 0;
}