C語言棧程式

棧的C語言實現

以下是棧抽象資料型別中基本操作（push()，pop()，peek()，isEmpty()，isFull()）的實現，以及在C程式語言中列印輸出：

#include <stdio.h>
int MAXSIZE = 8;
int stack[8];
int top = -1;

/* Check if the stack is empty */
int isempty(){
   if(top == -1)
      return 1;
   else
      return 0;
}

/* Check if the stack is full */
int isfull(){
   if(top == MAXSIZE)
      return 1;
   else
      return 0;
}

/* Function to return the topmost element in the stack */
int peek(){
   return stack[top];
}

/* Function to delete from the stack */
int pop(){
   int data;
   if(!isempty()) {
      data = stack[top];
      top = top - 1;
      return data;
   } else {
      printf("Could not retrieve data, Stack is empty.\n");
   }
}

/* Function to insert into the stack */
int push(int data){
   if(!isfull()) {
      top = top + 1;
      stack[top] = data;
   } else {
      printf("Could not insert data, Stack is full.\n");
   }
}

/* Main function */
int main(){
   push(44);
   push(10);
   push(62);
   push(123);
   push(15);
   printf("Element at top of the stack: %d\n" ,peek());
   printf("Elements: \n");

   // print stack data
   while(!isempty()) {
      int data = pop();
      printf("%d\n",data);
   }
   printf("Stack full: %s\n" , isfull()?"true":"false");
   printf("Stack empty: %s\n" , isempty()?"true":"false");
   return 0;
}

輸出

Element at top of the stack: 15
Elements: 
15123
62
10
44
Stack full: false
Stack empty: true