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  1. #include<stdio.h>
  2.  
  3. #define SIZE 10
  4. double stack[SIZE];
  5. int sp;
  6.  
  7. void push(double value);
  8. double pop(void);
  9. int isFull(void);
  10. int isEmpty(void);
  11. void answer(void);
  12. void reset(void);
  13.  
  14. int main(void)
  15. {
  16.     reset();
  17.  
  18.     while(1){
  19.         int menu;
  20.         double x, y, v;
  21.  
  22.         scanf("%d", &menu);
  23.  
  24.         if (menu == 9) {
  25.             break;              
  26.         }
  27.  
  28.         switch (menu) {
  29.  
  30.         case 1: y = pop();
  31.         		x = pop();
  32.         		push(x + y);
  33.             	break;
  34.  
  35.         case 2: y = pop();
  36.             	x = pop();
  37.             	push(x - y);
  38.             	break;
  39.  
  40.         case 3: y = pop();
  41.             	x = pop();
  42.             	push(x * y);
  43.             	break;
  44.         case 4: y = pop();
  45.         		x = pop();
  46.         		push(x / y);
  47.         	    break;
  48.  
  49.         case 5: scanf("%lf", &v);
  50.             	push(v);
  51.             	printf("data:%lf\n", v);
  52.         		break;
  53.         default:
  54.             break;
  55.         }
  56.     }
  57.  
  58.     answer();
  59.  
  60.     return 0;
  61. }
  62.  
  63. void push(double value)
  64. {
  65.     if (isFull()) {
  66.         printf("stack overflow\n");
  67.         return;
  68.     }
  69.     stack[sp] = value;
  70.     sp++;
  71. }
  72.  
  73. double pop(void)
  74. {
  75.     if (isEmpty()) {
  76.         printf("stack underflow\n");
  77.         return 0;
  78.     }
  79.     sp--;
  80.     return stack[sp];
  81. }
  82.  
  83. int isFull(void)
  84. {
  85.     return sp >= SIZE;
  86. }
  87.  
  88. int isEmpty(void)
  89. {
  90.     return sp <= 0;
  91. }
  92.  
  93. void answer(void)
  94. {
  95.     printf("\n");
  96.     printf("answer:%lf\n", pop());
  97. }
  98.  
  99. void reset(void)
  100. {
  101.     sp = 0;
  102. }
  103.  
Success #stdin #stdout 0s 5428KB
comments (?)
stdin
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5
2
5
1
1
9
stdout
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data:2.000000
data:1.000000

answer:3.000000
https://ideone.com/BPxT8a
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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