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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.  
  15. int main(void) {
  16. 	reset();
  17.  
  18. 	while(1){
  19. 		int code;
  20. 		double a, b;
  21. 		scanf("%d", &code);
  22.  
  23.  
  24. 		switch(code){
  25. 			case 5:
  26. 				scanf("%lf",&a);
  27. 				push(a);
  28. 				printf("data:%f\n", a);
  29. 				break;
  30.  
  31. 			case 1:
  32. 				b = pop();
  33.                 a = pop();
  34.                 push(a + b);
  35.                 break;
  36.  
  37. 			case 2:
  38. 				b = pop();
  39.                 a = pop();
  40.                 push(a - b);
  41.                 break;
  42.  
  43. 			case 3:
  44.                 b = pop();
  45.                 a = pop();
  46.                 push(a * b);
  47.                 break;
  48.  
  49. 			case 4:
  50.                 b = pop();
  51.                 a = pop();
  52.                 push(a / b);
  53.                 break;
  54.  
  55. 			case 9: 
  56.                 answer();
  57.                 return 0;
  58.         }
  59. 	}
  60. }
  61.  
  62.  
  63.  
  64. void reset(void)
  65. {
  66. 	sp = 0;
  67. }
  68.  
  69. void push(double value)
  70. {
  71. 	if(!isFull()){
  72. 		stack[sp++] = value;
  73. 	}
  74. }
  75.  
  76. double pop(void)
  77. {
  78. 	if(!isEmpty()){
  79. 		return stack[--sp];
  80. 	}
  81. 	return 0;
  82. }
  83.  
  84. int isFull(void)
  85. {
  86. 	return sp >= SIZE;
  87. }
  88.  
  89. int isEmpty(void)
  90. {
  91. 	return sp <= 0;
  92. }
  93.  
  94. void answer(void)
  95. {
  96. 	if(!isEmpty()){
  97. 		printf("answer:%f\n",stack[sp-1]);
  98. 	}
  99. }
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin 
5 1 5 2 1 9
stdout 
data:1.000000
data:2.000000
answer:3.000000
https://ideone.com/lwzR3g
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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