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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #define STACK_SIZE 100
  4.  
  5. typedef int element;
  6. element stack[STACK_SIZE];  // 세미콜론 추가
  7. int top = -1;  // 세미콜론 추가
  8.  
  9. int isEmpty() {
  10.     return top == -1;
  11. }
  12.  
  13. int isFull() {
  14.     return top == STACK_SIZE - 1;
  15. }
  16.  
  17. void push(element item) {
  18.     if (isFull()) {
  19.         printf("\nStack is Full\n");
  20.         return;
  21.     }
  22.     stack[++top] = item;
  23. }
  24.  
  25. element pop() {
  26.     if (isEmpty()) {
  27.         printf("\nStack is Empty!\n");
  28.         return 0;
  29.     }
  30.     return stack[top--];
  31. }
  32.  
  33. element peek() {
  34.     if (isEmpty()) {
  35.         printf("\nStack is Empty!\n");
  36.         exit(1);  // Exit 함수 수정
  37.     }
  38.     return stack[top];
  39. }
  40.  
  41. void printStack() {
  42.     int i;
  43.     printf("\nStack [ ");
  44.     for (i = 0; i <= top; i++) {
  45.         printf("%d ", stack[i]);  // 요소 사이에 공백 추가
  46.     }
  47.     printf("]\n");
  48. }
  49.  
  50. int main(void) {  // void main → int main 변경 (표준 준수)
  51.     element item;
  52.     printf("순차 스택 연산\n");
  53.     printStack();
  54.  
  55.     push(1); printStack();
  56.     push(2); printStack();
  57.     push(3); printStack();
  58.  
  59.     item = peek();
  60.     printStack();
  61.     printf("peek => %d\n", item);
  62.  
  63.     item = pop();
  64.     printStack();
  65.     printf("\tpop => %d\n", item);
  66.  
  67.     item = pop();
  68.     printStack();
  69.     printf("\tpop => %d\n", item);
  70.  
  71.     item = pop();
  72.     printStack();
  73.     printf("\tpop => %d\n", item);
  74.  
  75.     return 0;
  76. }
  77.  
Success #stdin #stdout 0s 5280KB
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Standard input is empty
stdout
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순차 스택 연산

Stack [ ]

Stack [ 1 ]

Stack [ 1 2 ]

Stack [ 1 2 3 ]

Stack [ 1 2 3 ]
peek => 3

Stack [ 1 2 ]
	pop => 3

Stack [ 1 ]
	pop => 2

Stack [ ]
	pop => 1
https://ideone.com/S3Uu9m
language:
C (gcc 8.3)
created:
280 days ago
visibility:
public

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