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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. unsigned sum(const string &str) 
  6. {
  7.     unsigned result = 0;
  8.  
  9.     for (unsigned i = 0; str[i] != '\0'; ++i) {
  10.         if (str[i] > '0' && str[i] <= '9') {
  11.             result += (str[i] - '0');
  12.         }
  13.     }
  14.     return result;
  15. }
  16.  
  17. int main() 
  18. {
  19. 	string str("ab25c539fh7");
  20. 	cout << "Result: " << sum(str) << endl;
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 15224KB
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Standard input is empty
stdout
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Result: 31
https://ideone.com/YGm2Wr
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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