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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. int main() {
  5.   std::vector<std::string> foo{"foo","bar"};
  6.  
  7.   int len=0;
  8.   for (auto &str:foo)
  9.     len+=str.size();
  10.  
  11.   std::string result;
  12.   result.reserve(len);
  13.   for (auto &str:foo)
  14.     result.append(str);
  15.  
  16.   std::cout << result;
  17.   return 0;
  18. }
Success #stdin #stdout 0s 3428KB
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Standard input is empty
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foobar
https://ideone.com/2kpX2q
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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