谁能帮我把这警告去掉?
谁能帮我把这警告去掉?现在学数据结构,, 想写一个计算器,, 于是我就开始写...
但是才下手就发现有一个去不掉的警告....
三个文件: stack.h input.h cal.c
stack.h:
程序代码：#include <stdio.h>
#include <stdlib.h>
#ifndef _STACK_H__
#define _STACK_H__
#define _STACK_INIT_SIZE_ 100
#define _STACK_PUSH_SIZE_ 10
typedef int elem;
typedef struct stack{
void *base;
void *top;
int stacksize;
}Stack;
static inline void alloc_err(void)
{
fputs("Malloc Err\n", stderr);
exit(-1);
}
static inline int re_malloc(Stack *S, int size)
{
void *tmp;
tmp = realloc(S->base, size *
(S->stacksize + _STACK_PUSH_SIZE_));
if(tmp == NULL){
alloc_err();
}
S->base = tmp;
S->top = S->base + S->stacksize;
S->stacksize += _STACK_PUSH_SIZE_;
return 1;
}
#define stack_init(S, type) do{\
type *tmp;\
tmp = malloc(sizeof(type) * _STACK_INIT_SIZE_); \
if(tmp == NULL){ \
alloc_err(); \
} \
S->base = S->top = tmp; \
S->stacksize = _STACK_INIT_SIZE_; \
}while(0);
int inline stack_isempty(Stack *S)
{
return S->base == S->top ? 1 : 0;
}
//检查是否为空栈, 即base == top
#define stack_gettop(S, type) do{ \
return *((type *)S->top); \
}while(0);
//获取栈顶元素
#define stack_push(S, type, push) do{ \
if(((type *)S->top) - ((type *)S->base) == S->stacksize){ \
re_malloc(S, sizeof(type)); \
} \
*((type *)S->top)++ = push; \
}while(0);
//将元素插入栈中
#define stack_pop(S, type, pop) do{\
if(pop == NULL){ \
--((type *)S->top); \
} \
*pop = *(--((type *)S->top)); \
}while(0);
//出栈,,
//返回栈的长度
#define stack_lenth(S, type) do{\
return ((type)S->top) - ((type)S->base);\
}while(0);
//清空栈
void inline stack_clean(Stack *S)
{
S->top = S->base;
}
void inline stack_destory(Stack *S)
{
free(S->base);
}
#endif
input.h
程序代码：#include <stdio.h>
#ifndef _INPUT_H_
#define _INPUT_H_
typedef void *input_t;
#define input_init(input_t) do{;}while(0);
inline char input_getchar(void *input)
{
return getchar();
}
#endif
cal.c
程序代码：#include "input.h"
#include "stack.h"
void cal(void);
int main(void)
{
while(1){
cal();
}
return 0;
}
void cal(void)
{
Stack num, cha;
input_t input;
char ch;
input_init(input); /*初始化各个结构*/
stack_init((&num), int);
stack_init((&cha), char);
stack_push((&cha), char, '#'); /*将结束的符号压入符号栈*/
ch = input_getchar(input); /*获取用户输入的字符*/
}
具体的警告是:
22 [Warning] use of cast expressions as lvalues is deprecated
... 只吸收了Linux内核情景分析中内核使用的链表的构造加上数据结构的堆栈...