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  1. #include <iostream>
  2. #include <vector>
  3. #include <sstream>
  4.  
  5. std::vector<int> read_integers(std::istream & input)
  6. {
  7.     std::vector<int> numbers;
  8.  
  9.     int number = 0;
  10.     bool have_number = false;
  11.  
  12.     char c;
  13.  
  14.     // Loop until reading fails.
  15.     while (input.get(c)) {
  16.         if (c >= '0' && c <= '9') {
  17.             // We have a digit.
  18.             have_number = true;
  19.  
  20.             // Add the digit to the right of our number.  (No overflow check here!)
  21.             number = number * 10 + (c - '0');
  22.         } else if (have_number) {
  23.             // It wasn't a digit and we started on a number, so we hit the end of it.
  24.             numbers.push_back(number);
  25.             have_number = false;
  26.             number = 0;
  27.         }
  28.     }
  29.  
  30.     // Make sure if we ended with a number that we return it, too.
  31.     if (have_number) { numbers.push_back(number); }
  32.  
  33.     return numbers;
  34. }
  35.  
  36. int main() {
  37. 	auto const input_string = std::string("12f 356 48 r56 fs6879 57g 132e efw ddf312 323f");
  38. 	std::istringstream input_stream(input_string);
  39.  
  40. 	std::cout << "Input: " << input_string << std::endl;
  41.  
  42. 	auto ints = read_integers(input_stream);
  43.  
  44. 	std::cout << "Output:" << std::endl;
  45.  
  46. 	for (auto i = ints.begin(); i != ints.end(); ++i) {
  47. 		std::cout << "* " << *i << std::endl;
  48. 	}
  49.  
  50. 	return 0;
  51. }
Success #stdin #stdout 0s 3480KB
comments (?)
stdin 
Standard input is empty
stdout 
Input: 12f 356 48 r56 fs6879 57g 132e efw ddf312 323f
Output:
* 12
* 356
* 48
* 56
* 6879
* 57
* 132
* 312
* 323
https://ideone.com/BoIEJR
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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