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Remove specified string in a string

/ Published in: C++
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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using std::string;
  5. using std::cout;
  6.  
  7. void RemoveSubStr(const string& r, string& str)
  8. {
  9. 	// Make sure that the strings are not empty;
  10. 	int rlen = r.length();
  11. 	int strlen = str.length();
  12.  
  13. 	if (rlen <= 0 || strlen <=0)
  14. 		cout << "The string is empty." << '\n';
  15.  
  16. 	int i,j,pos;
  17.  
  18. 	for (i = 0; i < strlen; ++i) {
  19. 		pos = i;
  20. 		for (j = 0; j < rlen; ++j) {
  21. 			if (str[i] != r[j]) {
  22. 				break;
  23. 			}
  24. 			else if ( j == (rlen-1)){
  25. 				str.erase(pos,rlen);
  26. 				strlen = str.length();// After trimming, the length of string has changed.
  27. 				i = -1;
  28. 			}
  29. 			else
  30. 				++i;
  31. 		}
  32. 	}
  33. }
  34. int main()
  35. {
  36. 	string str = "heheo world";
  37. 	string r   = "he";
  38.  
  39. 	//RemoveSubStr(r,str);
  40.  
  41. 	// use STL function to remove the substring
  42. 	int pos = 0;
  43. 	while (pos != -1){
  44. 		pos = str.find(r);
  45. 		if( pos == -1 ) break;
  46. 		else
  47. 		str.erase(pos,r.length());
  48. 	}
  49.  
  50. 	cout << str << '\n';
  51.  
  52. 	return 0;
  53. }

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