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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4. #include <stack>
  5. #include <stdint.h>
  6. using namespace std;
  7.  
  8. int main() {
  9. 	vector<uint8_t> mem(30000,0);
  10. 	stack<int> branchStack;
  11. 	string src;
  12.  
  13. 	cin >> src;
  14.  
  15. 	int ptr = 0;
  16. 	int pc = 0;
  17. 	for(pc = 0; pc < src.length() ; ++pc) {
  18. 		// cout << pc  << ":" << src[pc] << endl;
  19. 		switch(src[pc]) {
  20. 			case '+':
  21. 				mem[ptr]++;
  22. 				break;
  23. 			case '-':
  24. 				mem[ptr]--;
  25. 				break;
  26. 			case '>':
  27. 				ptr++;
  28. 				break;
  29. 			case '<':
  30. 				ptr--;
  31. 				break;
  32. 			case ',':
  33. 				cin >> mem[ptr];
  34. 				break;
  35. 			case '.':
  36. 				cout << (char)mem[ptr];
  37. 				break;
  38. 			case '[':
  39. 				if (mem[ptr]) {
  40. 					branchStack.push(pc - 1);
  41. 				} else {
  42. 					for(int nest = 1 ; nest > 0 && pc < src.length() - 1 ; ++pc) {
  43. 						switch(src[pc + 1]) {
  44. 							case '[':
  45. 								nest++;
  46. 								break;
  47. 							case ']':
  48. 								nest--;
  49. 								break;
  50. 						}
  51. 					}
  52. 				}
  53. 				break;
  54. 			case ']':
  55. 				pc = branchStack.top();
  56. 				branchStack.pop();
  57. 				break;
  58. 		}
  59. 	}
  60. 	return 0;
  61. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
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>+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]>++++++++[<++++>-]<.>+++++++++++[<+++++>-]<.>++++++++[<+++>-]<.+++.------.--------.[-]>++++++++[<++++>-]<+.[-]++++++++++.
stdout
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Hello World!
https://ideone.com/GkS1L6
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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