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  1.  
  2. #include <stdio.h>
  3.  
  4. #define SIZE 10
  5.  
  6. double stack[SIZE];
  7. int sp;
  8.  
  9. void push(double value);
  10. double pop(void);
  11. int isFull(void);
  12. int isEmpty(void);
  13. void reset(void);
  14. void answer(void);
  15.  
  16. int main(void)
  17. {
  18.     int resp;
  19.     double data, a, b;
  20.  
  21.     reset();
  22.  
  23.     while(1){
  24.  
  25.  
  26.         int result = scanf("%d", &resp);
  27.  
  28.         if(result == EOF){
  29.             break;
  30.         }
  31.  
  32.         if(result != 1){
  33.             printf("Invalid input\n");
  34.             break;
  35.         }
  36.  
  37.         if(resp == 0) break;
  38.  
  39.         switch(resp){
  40.  
  41.             case 1:
  42.                 b = pop();
  43.                 a = pop();
  44.                 push(a + b);
  45.                 break;
  46.  
  47.             case 2:
  48.                 b = pop();
  49.                 a = pop();
  50.                 push(a - b);
  51.                 break;
  52.  
  53.             case 3:
  54.                 b = pop();
  55.                 a = pop();
  56.                 push(a * b);
  57.                 break;
  58.  
  59.             case 4:
  60.                 b = pop();
  61.                 a = pop();
  62.  
  63.                 if(b == 0){
  64.                     printf("Cannot divide by zero\n");
  65.                     push(a);
  66.                     push(b);
  67.                     break;
  68.                 }
  69.  
  70.                 push(a / b);
  71.                 break;
  72.  
  73.             case 5:
  74.                 printf("insert data:");
  75.                 if(scanf("%lf", &data) != 1){
  76.                     printf("Invalid input\n");
  77.                     return 1;
  78.                 }
  79.  
  80.                 push(data);
  81.                 break;
  82.  
  83.             case 9:
  84.                 answer();
  85.                 break;
  86.  
  87.             default:
  88.                 printf("Invalid command\n");
  89.                 break;
  90.         }
  91.     }
  92.  
  93.     return 0;
  94. }
  95.  
  96. void push(double value)
  97. {
  98.     if(isFull()){
  99.         printf("stack is full\n");
  100.     }else{
  101.         stack[sp++] = value;
  102.     }
  103. }
  104.  
  105. double pop(void)
  106. {
  107.     if(isEmpty()){
  108.         printf("stack is empty\n");
  109.         return 0;
  110.     }else{
  111.         return stack[--sp];
  112.     }
  113. }
  114.  
  115. int isFull(void)
  116. {
  117.     if(sp >= SIZE){
  118.         return 1;
  119.     }else{
  120.         return 0;
  121.     }
  122. }
  123.  
  124. int isEmpty(void)
  125. {
  126.     if(sp <= 0){
  127.         return 1;
  128.     }else{
  129.         return 0;
  130.     }
  131. }
  132.  
  133. void answer(void)
  134. {
  135.     double sum = 0;
  136.     int i;
  137.  
  138.     for(i = 0; i < sp; i++){
  139.         printf("Data %d: %g\n", i + 1, stack[i]);
  140.         sum += stack[i];
  141.     }
  142.  
  143.     printf("Answer %g\n", sum);
  144. }
  145.  
  146. void reset(void)
  147. {
  148.     sp = 0;
  149. }
  150.  
Success #stdin #stdout 0s 5320KB
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stdout
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insert data:insert data:Data 1: 3
Answer 3
https://ideone.com/XVApha
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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