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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4.  
  5. float to_float(const std::string& str)
  6. {
  7.    std::istringstream is(str) ;
  8.    float result ;
  9.  
  10.    is >> result ;
  11.    return result ;
  12. }
  13.  
  14. int main()
  15. {
  16.     std::string input ;
  17.     std::cout << "Enter a number\n" ;
  18.     std::cin >> input ;
  19.  
  20.     float value = to_float(input) ;
  21.     std::cout << "value is " << value << '\n' ;
  22. }
Success #stdin #stdout 0s 3436KB
comments (?)
stdin
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3.14159
stdout
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Enter a number
value is 3.14159
https://ideone.com/oXBOBM
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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