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Error messages

Your C++ functions can contain calls to the stop() function to raise an exception. We've partially defined a function add_positive_numbers() for you. Complete this function to raise exceptions.

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Optimizing R Code with Rcpp

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Anleitung zur Übung

  • If x is negative, raise an exception with the message: "x is negative".
  • If y is negative, raise an exception with the message: "y is negative".

Interaktive Übung

Vervollständige den Beispielcode, um diese Übung erfolgreich abzuschließen.

cppFunction('
  // adds x and y, but only if they are positive
  int add_positive_numbers(int x, int y) {
      // if x is negative, stop
      if(___) stop("x is negative") ;
    
      // if y is negative, stop
      if(___) ___("y is negative") ;
     
      return x + y ;
  }
')

# Call the function with positive numbers
add_positive_numbers(2, 3)

# Call the function with a negative number
add_positive_numbers(-2, 3)
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