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  1. #include <cstring>
  2. #include <cstdio>
  3. #include <algorithm>
  4. #include <cassert>
  5.  
  6. using namespace std;
  7.  
  8. typedef unsigned size_t;
  9.  
  10. char* read_all_text(const char* _unused, size_t* len ) {
  11. 	const char* buf = "The quick brown fox jumps\nover\n\nthe lazy dog.";
  12. 	size_t L = strlen(buf);
  13.  
  14. 	char* p = new char[L+1];
  15. 	strcpy(p,buf);
  16. 	p[L] = 0;
  17.  
  18. 	*len = L;
  19.  
  20. 	return p;
  21. }
  22.  
  23. int main() {
  24. 	const char* path = nullptr;
  25.  
  26. 	// read
  27. 	size_t len = 0;
  28. 	char* str = read_all_text(path,&len);
  29. 	const char* end = str + len;
  30.  
  31. 	// count and allocate
  32. 	size_t line_ct = count((const char*)str,end,'\n') + 1;
  33.  
  34. 	size_t ldx = 0;
  35. 	const char** lines = new const char*[line_ct];
  36.  
  37. 	// process
  38. 	lines[ldx++] = str;
  39. 	for ( char* p = str; p < end; ++p ) {
  40. 		switch ( *p ) {
  41. 			case '\n':
  42. 				assert(ldx < line_ct);
  43. 				lines[ldx++] = p + 1;
  44. 			case '\r':
  45. 				*p = 0;
  46. 				break;
  47.  
  48. 			default: ;
  49. 		}
  50. 	}
  51.  
  52. 	// beep boop
  53. 	for ( size_t idx = 0; idx < line_ct; ++idx )
  54. 		printf("%i %s\n",idx,lines[idx]);
  55.  
  56. 	// clean-up
  57. 	delete[] lines;
  58. 	delete[] str;
  59. }
Success #stdin #stdout 0s 3228KB
comments (?)
stdin
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Standard input is empty
stdout
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0 The quick brown fox jumps
1 over
2 
3 the lazy dog.
https://ideone.com/xRFMAk
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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