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  1. #include <stdio.h>
  2. #define SIZE 5
  3.  
  4. int stack[SIZE];
  5. int sp;
  6.  
  7. void push(int value) {
  8.     if (sp < SIZE) {
  9.         stack[sp++] = value;
  10.     } else {
  11.         printf("Stack Overflow\n");
  12.     }
  13. }
  14.  
  15. int pop(void) {
  16.     if (sp > 0) {
  17.         return stack[--sp];
  18.     } else {
  19.         printf("Stack Underflow\n");
  20.         return -1;
  21.     }
  22. }
  23.  
  24. int main(void) {
  25.     sp = 0;
  26.     int resp, data;
  27.  
  28.     while (1) {
  29.         printf("1:push 2:pop 0:end : ");
  30.         scanf("%d", &resp);
  31.  
  32.         if (!resp) break;
  33.  
  34.         switch (resp) {
  35.             case 1: 
  36.                 printf("push : "); 
  37.                 scanf("%d", &data);
  38.                 push(data);
  39.                 break;
  40.             case 2: 
  41.                 pop();
  42.                 break;
  43.         }
  44.  
  45.         printf("\n");
  46.         for (int i = 0; i < sp; i++) {
  47.             printf("stack[%d]=%d\n", i, stack[i]);
  48.         }
  49.     } // ← ここに while を閉じるカッコが必要です
  50.  
  51.     return 0;
  52. }
Success #stdin #stdout 0.01s 5320KB
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Standard input is empty
stdout
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1:push 2:pop 0:end :
https://ideone.com/xlICye
language:
C (gcc 8.3)
created:
6 hours ago
visibility:
public

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