C语言中栈和队列实现表达式求值的实例语言中栈和队列实现表达式求值的实例
主要介绍了C语言中栈和队列实现表达式求值的实例的相关资料,这里主要是对数据结构中栈和队列的理解和应用，需
要的朋友可以参考下
C语言中栈和队列实现表达式求值的实例语言中栈和队列实现表达式求值的实例
实现代码：实现代码：
#include<stdio.h>
#include<stdlib.h>
#define OK 1
#define ERROR 0
#define STACK_SIZE 20
#define STACK_INCREMENT 10
#define QUEUE_SIZE 20
typedef int Status;
typedef char StackElemtype;
typedef struct Stack{
StackElemtype* base;
StackElemtype* top;
int stackSize;
}Stack;
Status StackInit(Stack* s){
s->base = (StackElemtype*)malloc(sizeof(StackElemtype) * STACK_SIZE);
if( !s->base )
return ERROR;
s->top = s->base;
s->stackSize = STACK_SIZE;
return OK;
}
Status Pop(Stack* s,StackElemtype* value){
if( s->base == s->top ){
printf("stack empty");
return ERROR;
}
*value = *(--(s->top));
return OK;
}
Status Push(Stack* s,StackElemtype value){
if( s->top - s->base == s->stackSize){
s->base = (StackElemtype*)realloc(s->base,sizeof(StackElemtype) * (STACK_INCREMENT + STACK_SIZE));
if( !s->base )
return ERROR;
s->top = s->base + STACK_SIZE;
s->stackSize = STACK_SIZE + STACK_INCREMENT;
}
*(s->top) = value;
s->top++;
return OK;
}
int StackLength(Stack s){
return s.top - s.base;
}
typedef double StackElemtype_ForValueExperssion;
typedef struct Stack_2{
StackElemtype_ForValueExperssion* base;
StackElemtype_ForValueExperssion* top;
int stackSize;
}Stack_2;
Status StackInit_2(Stack_2* s){
s->base = (StackElemtype_ForValueExperssion*)malloc(sizeof(StackElemtype_ForValueExperssion) * STACK_SIZE);
if( !s->base )
return ERROR;
s->top = s->base;
s->stackSize = STACK_SIZE;
return OK;
}
Status Pop_2(Stack_2* s,StackElemtype_ForValueExperssion* value){
if( s->base == s->top ){
printf("stack empty");
return ERROR;
}
*value = *(--(s->top));
return OK;
}
Status Push_2(Stack_2* s,StackElemtype_ForValueExperssion value){
if( s->top - s->base == s->stackSize){
资源评论
