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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4. int main()
  5. {
  6. std::ostringstream os(std::string(10, '*'));
  7. os.seekp(3);
  8. os << 1;
  9. os.seekp(8);
  10. os << 2;
  11. std::cout << os.str() << '\n';
  12. }
  13.  
Success #stdin #stdout 0s 2860KB
stdin
Standard input is empty
stdout
***1****2*