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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4. using namespace std;
  5.  
  6. string replace_num_with_x(const string &str);
  7.  
  8. int main() {
  9.     cout << "Please enter a line of text:";
  10.     string str;
  11.     getline(cin, str);
  12.     cout << replace_num_with_x(str);
  13. }
  14.  
  15. string replace_num_with_x(const string &str) {
  16.     istringstream str_strm(str);
  17.     string word, result;
  18.  
  19.     while (str_strm >> word) {
  20.         bool all_digits = true;
  21.         string::size_type word_size = word.size();
  22.  
  23.         for (string::size_type i = 0; i < word_size; ++i) {
  24.             if (word[i] < '0' || word[i] > '9') {
  25.                 all_digits = false;
  26.                 break;
  27.             }
  28.         }
  29.  
  30. 		if (!result.empty()) {
  31. 			result += ' ';
  32. 		}
  33.  
  34.         if (all_digits) {
  35.             result.append(word_size, 'x');
  36.         } else {
  37.             result += word;
  38.         }
  39.     }
  40.  
  41.     return result;
  42. }
Success #stdin #stdout 0s 4720KB
comments (?)
stdin
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My userID is john17 and my 4 digit pin is 1234 which is secret
stdout
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Please enter a line of text:My userID is john17 and my x digit pin is xxxx which is secret
https://ideone.com/Kidy9w
language:
C++ 4.3.2 (gcc-4.3.2)
created:
4 years ago
visibility:
public

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