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chrisseaton/distance.c Secret

Last active May 22, 2019
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#include <stdlib.h>
#include <stdio.h>
#include <libdistance.h>
int main(int argc, char **argv) {
graal_isolate_t *isolate = NULL;
graal_isolatethread_t *thread = NULL;
if (graal_create_isolate(NULL, &isolate, &thread) != 0) {
fprintf(stderr, "graal_create_isolate error\n");
return 1;
double a_lat = strtod(argv[1], NULL);
double a_long = strtod(argv[2], NULL);
double b_lat = strtod(argv[3], NULL);
double b_long = strtod(argv[4], NULL);
printf("%.2f km\n", distance(thread, a_lat, a_long, b_lat, b_long));
if (graal_detach_thread(thread) != 0) {
fprintf(stderr, "graal_detach_thread error\n");
return 1;
return 0;
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