Conversion between numbers using cast
Although there are several numeric data types available in C++, you only need to manipulate integers (int) and floating point numbers (double).
In the last exercise, you converted an integer to a double by appending .0 at the end. However, you can also use casting to change the data types.
This exercise is part of the course
Optimizing R Code with Rcpp
Exercise instructions
- Load the
Rcpppackage. - Evaluate
17 / 2in C++ withevalCpp(). - Cast 17 to a
doubleand divide it by 2. - Cast 56.3 to an
int.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Load Rcpp
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# Evaluate 17 / 2 in C++
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# Cast 17 to a double and divide by 2
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# Cast 56.3 to an int
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