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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. char* read_string(size_t *size){
  5.     char *str;
  6.     int c;
  7.     size_t length = 0;
  8.     str = realloc(NULL, sizeof(char)*(*size));
  9.     if(!str)return str;
  10.     while((c=getchar()) != EOF  &&  c != '\n'){
  11.         str[length++] = c;
  12.         if(length == *size) {
  13.         	str = realloc(str, sizeof(char)*(*size += 10));
  14.             if(!str)
  15.             	return str;
  16.         }
  17.     }
  18.     str[length++] = '\0';
  19.     size = length;
  20.     return str;
  21. }
  22.  
  23. int main() {
  24. 	int n;
  25. 	scanf("%d", &n);
  26. 	getchar();
  27. 	char tape[10000];
  28. 	for (int k = 0; k < n; k++)
  29. 		tape[k] = 0;
  30. 	int pointer = 0;
  31. 	size_t length = 100;
  32. 	char *program = read_string(&length);
  33. 	printf("%s\n", program);
  34. 	for (unsigned int i = 0; i < length; i++) {
  35. 		if (program[i] == '>')
  36. 			pointer++;
  37.  
  38. 		if (program[i] == '<')
  39. 			pointer--;
  40.  
  41. 		if (program[i] == '+')
  42. 			tape[pointer]++;
  43.  
  44. 		if (program[i] == '-')
  45. 			tape[pointer]--;
  46.  
  47. 		if (program[i] == '.')
  48. 			printf("%c", tape[pointer]);
  49.  
  50. 		if (program[i] == ',')
  51. 			scanf("%c", &tape[pointer]);
  52.  
  53. 		if (program[i] == '[') {
  54. 			if (tape[pointer] == 0) {
  55. 				int counter = 1;
  56. 				while (counter > 0) {
  57. 					i++;
  58. 					if (program[i] == '[')
  59. 						counter++;
  60. 					if (program[i] == ']')
  61. 						counter--;
  62. 				}
  63. 			}
  64.         }
  65.         else if (program[i] == ']') {
  66. 			if (tape[pointer] != 0) {
  67. 				int counter = 1;
  68. 				while (counter > 0) {
  69. 					i--;
  70. 					if (program[i] == '[')
  71. 						counter--;
  72. 					if (program[i] == ']')
  73. 						counter++;
  74. 				}
  75. 			}
  76.         }
  77.     }
  78.  
  79. 	return 0;
  80. }
Success #stdin #stdout 0s 2248KB
comments (?)
stdin
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100
++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.
stdout
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++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.
Hello World!
https://ideone.com/v9WWXn
language:
C (gcc 8.3)
created:
8 years ago
visibility:
secret

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