打印数据库中某个表中的元素
int search_frd(sqlite3 *db,struct frd *f)
{
char *fsql = "select id_to from frd where id_from = %s",sql[256] = "";
int err;
struct mgr2 m = {f,0};
snprintf(sql,sizeof sql,fsql,f->id_from);
err = sqlite3_exec(db,sql,query_frd,&m,NULL);
if(err != SQLITE_OK){
return -2;
}
if(0 == m.count){
return -1;
}
return 0;
}
大佬们帮我看看,我想打印出找到所有id_to该怎么办?