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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 sp;
  19.         double val, cal1, cal2;
  20.  
  21.         scanf("%d", &sp);
  22.  
  23.         if (sp == 9) {
  24.             break;
  25.         }
  26.  
  27.         switch (sp) {
  28.             case 1:
  29.                 cal2 = pop();
  30.                 cal1 = pop();
  31.                 push(cal1 + cal2);
  32.                 break;
  33.             case 2:
  34.                 cal2 = pop();
  35.                 cal1 = pop();
  36.                 push(cal1 - cal2);
  37.                 break;
  38.             case 3:
  39.                 cal2 = pop();
  40.                 cal1 = pop();
  41.                 push(cal1 * cal2);
  42.                 break;
  43.             case 4:
  44.                 cal2 = pop();
  45.                 cal1 = pop();
  46.                 push(cal1 / cal2);
  47.                 break;
  48.             case 5:
  49.                 scanf("%lf", &val);
  50.                 push(val);
  51.                 printf("data:%f\n", val);
  52.                 break;
  53.         }
  54. }
  55.         answer();
  56.         return 0;
  57. }
  58.  
  59. void push(double value){
  60. 	if (isFull() == 0) {
  61.  
  62.         stack[sp++] = value;
  63.     } else {
  64.         printf("Stack is full.\n");
  65.     }
  66. }
  67. double pop(void){
  68. 	if (isEmpty() == 0) {
  69.         return stack[--sp];
  70.     } else {
  71.         printf("Stack is empty.\n");
  72.         return 0;
  73.     }
  74. }
  75. int isFull(void){
  76. 	if (sp >= SIZE) {
  77.         return 1;
  78.     } else {
  79.         return 0;
  80.     }
  81. }
  82. int isEmpty(void){
  83. if (sp <= 0) {
  84.         return 1;
  85.     } else {
  86.         return 0;
  87.     }
  88. }
  89. void answer(void){
  90. 	printf("answer:%f\n", stack[sp - 1]);
  91. }
  92. void reset(void){
  93. 	while(!isEmpty()){
  94. 	 pop();
  95. 	}
  96. }
Success #stdin #stdout 0s 5316KB
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/W98K46
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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