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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.     reset();
  16.  
  17.     while(1){
  18.         int select;
  19.         double d, val1, val2;
  20.  
  21.         scanf("%d", &select);
  22.         switch(select){
  23.             case 1:
  24.                 val2 = pop();
  25.                 val1 = pop();
  26.                 push(val1 + val2);
  27.                 break;
  28.             case 2:
  29.                 val2 = pop();
  30.                 val1 = pop();
  31.                 push(val1 - val2);
  32.                 break;
  33.             case 3:
  34.                 val2 = pop();
  35.                 val1 = pop();
  36.                 push(val1 * val2);
  37.                 break;
  38.             case 4:
  39.                 val2 = pop();
  40.                 val1 = pop();
  41.                 push(val1 / val2);
  42.                 break;
  43.             case 5:
  44.                 scanf("%lf", &d);
  45.                 push(d);
  46.                 printf("data:%f\n", d);
  47.                 break;
  48.             case 9:
  49.                 goto end_loop;
  50.             default:
  51.                 break;
  52.         }
  53.     }
  54.     end_loop:
  55.  
  56.     answer();
  57.     return 0;
  58. }
  59.  
  60. void push(double value) {
  61.     if (isFull()) {
  62.         return;
  63.     }
  64.     stack[sp] = value;
  65.     sp++;
  66. }
  67.  
  68. double pop(void) {
  69.     if (isEmpty()) {
  70.         return 0.0;
  71.     }
  72.     sp--;
  73.     return stack[sp];
  74. }
  75.  
  76. int isFull(void) {
  77.     if (sp >= SIZE) {
  78.         return 1;
  79.     }
  80.     return 0;
  81. }
  82.  
  83. int isEmpty(void) {
  84.     if (sp <= 0) {
  85.         return 1;
  86.     }
  87.     return 0;
  88. }
  89.  
  90. void answer(void) {
  91.     printf("answer:%f\n", stack[0]);
  92. }
  93.  
  94. void reset(void) {
  95.     sp = 0;
  96. }
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
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5
1
5
2
1
9
stdout
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data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/tsGoCR
language:
C (gcc 8.3)
created:
6 hours ago
visibility:
public

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