#include<stdio.h>
struct happy
{
int year;
int month;
int day;
};
int x(struct happy *q);
int main()
{
struct happy a;
x(&a);
return 0;
}
int x(struct happy *q)
{
printf(" ");
return 0;
}
19 21 D:\谭浩强C作业合集\第九章\第二条.c [Error] unused parameter 'q' [-Werror=unused-parameter]