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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 input;
  20. 	    double value;
  21. 	    double a,b;
  22.  
  23. 		scanf("%d",&input);
  24.  
  25. 		switch(input){
  26. 			case 1:
  27. 			b = pop();
  28. 			a = pop();
  29. 			push(a + b);
  30. 			break;
  31.  
  32. 			case 2:
  33. 			b = pop();
  34. 			a = pop();
  35. 			push(a - b);
  36. 			break;
  37.  
  38. 			case 3:
  39. 			b = pop();
  40. 			a = pop();
  41. 			push(a * b);
  42. 			break;
  43.  
  44. 			case 4:
  45. 			b = pop();
  46. 			a = pop();
  47. 			push(a / b);
  48. 			break;
  49.  
  50. 			case 5:
  51. 			scanf("%lf",&value);
  52. 			printf("data:%lf\n",value);
  53. 			push(value);
  54. 			break;
  55.  
  56. 			case 9:
  57. 			goto END;
  58. 		}
  59. 	}
  60. END:
  61.     answer();
  62.  
  63. 	return 0;
  64. }
  65.  
  66. void push(double value)
  67. {
  68. 	if(!isFull()){
  69. 		stack[sp] = value;
  70. 		sp++;
  71. 	}
  72. }
  73.  
  74. double pop(void)
  75. {
  76. 	if(!isEmpty()){
  77. 		sp--;
  78. 		return stack[sp];
  79. 	}
  80. 	return 0;
  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("answer:%lf\n",stack[sp - 1]);
  96. }
  97.  
  98. void reset(void)
  99. {
  100. 	sp = 0;
  101. }
Success #stdin #stdout 0s 5308KB
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/Aw31SO
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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