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  1. #include <stdio.h>
  2.  
  3. #define SIZE 5
  4.  
  5. int stack[SIZE];
  6. int sp = 0;
  7.  
  8. void push(int data) {
  9.     printf("push()sp = %d\n", sp);
  10.  
  11.     if (sp >= SIZE) return;
  12.  
  13.     stack[sp] = data;
  14.     sp++;
  15. }
  16.  
  17. int pop(void) {
  18.     printf("pop()sp = %d\n", sp);
  19.  
  20.     if (sp <= 0) return -1;
  21.  
  22.     sp--;
  23.     return stack[sp];
  24. }
  25.  
  26. void printStack(void) {
  27.     printf("printstack: ");
  28.     for (int i = 0; i < sp; i++) {
  29.         printf("%d ", stack[i]);
  30.     }
  31.     printf("\n");
  32. }
  33.  
  34. int main(void) {
  35.     push(1);
  36.     push(2);
  37.     push(3);
  38.  
  39.     printStack();
  40.  
  41.     printf("%d\n", pop());
  42.     printf("%d\n", pop());
  43.     printf("%d\n", pop());
  44.     printf("%d\n", pop());
  45.  
  46.     return 0;
  47. }
Success #stdin #stdout 0s 5292KB
comments (?)
stdin
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Standard input is empty
stdout
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push()sp = 0
push()sp = 1
push()sp = 2
printstack: 1 2 3 
pop()sp = 3
3
pop()sp = 2
2
pop()sp = 1
1
pop()sp = 0
-1
https://ideone.com/oM3LJJ
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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