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  1. #include <iostream>
  2.  
  3. void bf_run(char const* codeptr, unsigned char* memptr)
  4. {
  5. 	while(*codeptr)
  6. 	{
  7. 		switch(*codeptr)
  8. 		{
  9. 		case '.':
  10. 			std::cout << static_cast<char>(*memptr);
  11. 			break;
  12.  
  13. 		case ',':
  14. 			std::cin.read(reinterpret_cast<char*>(memptr), 1);
  15. 			break;
  16.  
  17. 		case '>':
  18. 			++memptr;
  19. 			break;
  20.  
  21. 		case '<':
  22. 			--memptr;
  23. 			break;
  24.  
  25. 		case '+':
  26. 			++*memptr;
  27. 			break;
  28.  
  29. 		case '-':
  30. 			--*memptr;
  31. 			break;
  32.  
  33. 		case '[':
  34. 			++codeptr;
  35.  
  36. 			while(*memptr)
  37. 				bf_run(codeptr, memptr);
  38.  
  39. 			while(*codeptr && *codeptr != ']')
  40. 				++codeptr;
  41.  
  42. 			break;
  43.  
  44. 		case ']':
  45. 			return;
  46.  
  47. 		default:
  48. 			break;
  49. 		}
  50.  
  51. 		++codeptr;
  52. 	}
  53. }
  54.  
  55. int main()
  56. {
  57. 	char const source[] =
  58. 	"++++++++++"
  59. 	"["
  60. 	">+++++++>++++++++++>+++>+<<<<-"
  61. 	"]"
  62. 	">++."
  63. 	">+."
  64. 	"+++++++."
  65. 	"."
  66. 	"+++."
  67. 	">++."
  68. 	"<<+++++++++++++++."
  69. 	">."
  70. 	"+++."
  71. 	"------."
  72. 	"--------."
  73. 	">+."
  74. 	">."
  75. 	"+++.";
  76.  
  77. 	unsigned char memory[1024] = {};
  78.  
  79. 	bf_run(source, memory);
  80. }
Success #stdin #stdout 0s 2828KB
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Standard input is empty
stdout
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Hello World!
https://ideone.com/EVnTV
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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