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//stack.h
#ifndef STACK_H
#define STACK_H
#define STACK_CAPACITY 20//maximum size of stack
typedef int stackEle;
typedef struct
{
stackEle myArray[ STACK_CAPACITY ];
int myTop;
}stack;
//construct(initialize) an empty stack
stack *stack_init(void);
//return 1 if stack is em ......
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#include <stdio.h>
int main()
{
int i = 0;
clock_t start_time, end_time;
start_time = clock(); //¿ªÊ¼¼ÆÊ±, start_time = 0
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