怎樣才能創(chuàng)建一個空鏈棧

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創(chuàng)建一個空鏈棧PLinkStack createEmptyStack_link(void){ PLinkStack plstack; Plstack = (PLinkStack )malloc( sizeof(struct LinkStack)); if (plstack != NULL) plstack-top = NULL; else printf("Out of space! \n"); return (plstack); }