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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. using namespace std;
  5.  
  6.  
  7. int main(int argc, char * argv[])
  8. {
  9. float f;
  10. cin >> f;
  11. cout << setprecision(18) << f << endl;
  12.  
  13. cin >> f;
  14. cout << setprecision(18) << f << endl;
  15. }
  16.  
Success #stdin #stdout 0s 5640KB
stdin
1.234
1.233999
stdout
1.23399996757507324
1.23399901390075684