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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. struct queue{
  6. 	int storage[100000];
  7. 	int start;
  8. 	int finish;
  9. 	queue(){
  10. 		start = 0;
  11. 		finish = 0;
  12. 	}
  13.  
  14. 	void push(int n){
  15. 		storage[finish] = n;
  16. 		finish++;
  17. 	}
  18.  
  19. 	int pop(){
  20. 		int a = storage[start];
  21. 		start++;
  22. 		return a;
  23. 	}
  24.  
  25. 	int front(){
  26. 		return storage[start];
  27. 	}
  28.  
  29. 	int size(){
  30. 		return finish - start;
  31. 	}
  32.  
  33. 	string clear(){
  34. 		finish = 0;
  35. 		start = 0;
  36. 		return "ok";
  37. 	}
  38.  
  39. 	string exit(){
  40. 		return "bye";
  41. 	}
  42. };
  43.  
  44. int main() {
  45. 	string a;
  46. 	queue x;
  47. 	while(cin >> a){
  48. 		if(a == "push"){
  49. 			int n;
  50. 			cin >> n;
  51. 			x.push(n);
  52. 			cout << "ok" << endl;
  53. 		}
  54. 		if(a == "pop"){
  55. 			cout << x.pop() << endl;
  56. 		}
  57. 		if(a == "front"){
  58. 			cout << x.front() << endl;
  59. 		}
  60. 		if(a == "size"){
  61. 			cout << x.size() << endl;
  62. 		}
  63. 		if(a == "clear"){
  64. 			cout << x.clear() << endl;
  65. 		}
  66. 		if(a == "exit"){
  67. 			cout << x.exit() << endl;
  68. 			return 0;
  69. 		}
  70. 	}
  71. 	return 0;
  72. }
Success #stdin #stdout 0s 3732KB
comments (?)
stdin
copy 
push 123
size
push -5 
pop
exit
stdout
copy 
ok
1
ok
123
bye
https://ideone.com/LFqYZ9
простая очередь массивом
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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