C語言：泛型棧的一次嘗試__C語言

嘗試了用C做一個泛型的棧，拋出來跟大家交流一下。

#include <stdio.h>/** * Make a struct for stacks. *I hope to make a generic struct of stacks. *I may have a try. * *//** Two variables: *01.pointer to char. *02. the position of the stack. *from 0 to MAX *03. the length of the array of char which is malloc.; */typedef struct Stack *StackSP;struct Stack{void *pt;size_t top;size_t length;};/**function judge whether stack is empty.  *argument sp is a pointer to Stack. * *should be aware that top is equal to zero while stack is empty. */#define size_t ifempty(StackSP sp)  sp->top/**Push an element into the top of the stack. */#define push(vartype, stacksp, value)\if(stacksp->top == stacksp->length) fprintf(stderr,"error : stack is full.");\((vartype *)stacksp->pt)[stacksp->top++] = value ;/**Pop()function return  an element from the top of the stack. *Warning : the element is also an pointer to void. * so you cannot referrence the variable by this pointer, * you show make some conventions. */#define pop(vartype, stacksp)\(stacksp->top == 0) ? NULL : (((vartype *) stacksp->pt)[--stacksp->top])/**Free the space applied. */#define closestack(vartype, stacksp) if(stacksp->pt == NULL){\free((vartype *)stacksp->pt);\stacksp->top = 0;}/**Malloc a space for stack. ***/#define openstack(vartype,stacksp,op_length)  \stacksp->pt = malloc(sizeof(vartype) * op_length );\stacksp->length  = op_length; \stacksp->top = 0;

 

 

編譯時間爆出幾個warning，顯然用C做泛型還是有些不理智。