y=45.3
library(Rcpp)
cppFunction(
"NumericVector demo_fun_cpp(double x) {
    NumericVector out1(50);
    out1[0] = 2;
    for (int i=1; i < 50; ++i) {
        out1[i]=x+y+out1[i-1];
    }
    return out1;
}" )