source: CIVL/mods/dev.civl.com/examples/languageFeatures/abstractFun.cvl@ cb4d4f4

#include<civlc.cvh>
#include<stdio.h>

$input int N;
$assume(N>2);
$abstract int colorOf(double x);

void main() {
  double u[N];

  void f() {
    int x = colorOf(u[2]);

    printf("x=%d\n", x);
    x = colorOf(u[1]);
    printf("x=%d\n", x);
  }
  f();
}