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library(Rcpp)
setwd("C:/Users/luan_/luansheng/luansheng.github.io/code")
dyn.load("fibonacci.dll")
.Call("fibWrapper",10)

## [1] 55

.Library

## [1] "C:/PROGRA~1/R/R-34~1.0PA/library"

.libPaths()

## [1] "C:/Users/luan_/Documents/R/win-library/3.4"
## [2] "C:/Program Files/R/R-3.4.0patched/library"