diff options
author | EliteTK <tomasz.kramkowski@gmail.com> | 2015-06-19 19:12:12 +0100 |
---|---|---|
committer | EliteTK <tomasz.kramkowski@gmail.com> | 2015-06-19 19:12:12 +0100 |
commit | da87fcf25e0c94e57f00df84679cd6fadc56ed46 (patch) | |
tree | 3c53eea9db01039990455af870a2ca65e7e5a123 /poly_perim.c | |
parent | 75d2e00662416224f4b745e0004f48f1fc1d9665 (diff) | |
parent | 7bf25fb8f0e4643a67894417a95d39e5901b1824 (diff) | |
download | c-stuff-da87fcf25e0c94e57f00df84679cd6fadc56ed46.tar.gz c-stuff-da87fcf25e0c94e57f00df84679cd6fadc56ed46.tar.xz c-stuff-da87fcf25e0c94e57f00df84679cd6fadc56ed46.zip |
Merge branch 'master' of https://github.com/EliteTK/c-stuff
Diffstat (limited to 'poly_perim.c')
-rw-r--r-- | poly_perim.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/poly_perim.c b/poly_perim.c new file mode 100644 index 0000000..8f1528f --- /dev/null +++ b/poly_perim.c @@ -0,0 +1,25 @@ +#include <stdio.h> +#include <math.h> + +double poly_perim(unsigned ndims, double *xcoords, double *ycoords) +{ + double retval = 0; + + for (unsigned i = 0; i < ndims; i++) { + double left = xcoords[(i + 1) % ndims] - xcoords[i]; + double right = ycoords[(i + 1) % ndims] - ycoords[i]; + + retval += sqrt(left * left + right * right); + } + + return retval; +} + +int main(void) +{ + printf("Perimiter: %f\n", poly_perim(3, + (double []){1, 1, 4}, + (double []){2, 5, 5})); + + return 0; +} |