tests/testthat/examples/knitr-examples/090-engine-c.md

In parsermd: Formal Parser and Related Tools for R Markdown Documents

Compile C code

# is gcc there?
Sys.which("gcc")

##            gcc 
## "/usr/bin/gcc"

Does engine = 'c' work?

void square(double *x) {
  *x = *x * *x;
}

Test the square() function:

.C("square", 9)

## [[1]]
## [1] 81

.C("square", 123)

## [[1]]
## [1] 15129

parsermd documentation built on Aug. 21, 2025, 5:27 p.m.