1

是的，以前有人问过，我已经听从了这里的建议，把我的声明放在最上面仍然没有用。

void map_delete(map_t *map, char *key) {
   assert(map_contains(map, key));

   map_elem_t *prev;
   map_elem_t *elem_to_remove;

   prev = map->elem;
   while(strcmp(prev->next->key, key) != 0) prev= prev->next;

   elem_to_remove = prev->next;
   prev->next = elem_to_remove->next;
   free(elem_to_remove);
}


map.c(74): error C2143: syntax error : missing ';' before 'type'
map.c(76): error C2065: 'prev' : undeclared identifier
map.c(76): warning C4047: '=' : 'int' differs in levels of indirection from 'map_elem_t *'
map.c(77): error C2065: 'prev' : undeclared identifier
map.c(77): error C2223: left of '->next' must point to struct/union
map.c(77): error C2198: 'strcmp' : too few arguments for call
map.c(77): error C2065: 'prev' : undeclared identifier
map.c(77): error C2065: 'prev' : undeclared identifier
map.c(77): error C2223: left of '->next' must point to struct/union
map.c(79): error C2065: 'elem_to_remove' : undeclared identifier
map.c(79): error C2065: 'prev' : undeclared identifier
map.c(79): error C2223: left of '->next' must point to struct/union
map.c(80): error C2065: 'prev' : undeclared identifier
map.c(80): error C2223: left of '->next' must point to struct/union
map.c(80): error C2065: 'elem_to_remove' : undeclared identifier
map.c(80): error C2223: left of '->next' must point to struct/union
map.c(81): error C2065: 'elem_to_remove' : undeclared identifier
map.c(81): warning C4022: 'free' : pointer mismatch for actual parameter 1

注意代码的逻辑是正确的，因为它在另一台机器上工作，它的编译器对布局不满意

4

1 回答 1

3

编译器抱怨，因为assert不是声明。您需要移动assert它，使其位于声明之后。

使用支持 C89 的最新标准的 C 编译器将是一个不错的举措。

于 2013-07-18T13:29:21.760 回答