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  1. import std.stdio;
  2. import std.conv: to;
  3. import std.string: isNumeric;
  4. import std.range: iota, generate, repeat, take, enumerate;
  5. import std.algorithm.iteration: map, each, reduce, joiner;
  6. import std.typecons: Tuple;
  7. import std.array: array;
  8. import std.random: uniform01, uniform;
  9. import std.format: format;
  10. import std.math: sqrt;
  11.  
  12. import std.algorithm.sorting: sort;
  13. import std.algorithm.searching: find;
  14.  
  15. struct Point
  16. {
  17. 	double x;
  18. 	double y;
  19. }
  20.  
  21. void main(string[] args)
  22. {
  23. 	if ((args[1..$].length != 1) || !args[1].isNumeric) {
  24. 		writeln("usage: ./dots N");
  25. 		return;
  26. 	}
  27.  
  28. 	uint n;
  29. 	try {
  30. 		n = args[1].to!uint;
  31. 		if (n<2) throw new Exception("N is less than two");
  32. 	}
  33. 	catch (Exception e) {
  34. 		writeln("N must be an integer, more than 1");
  35. 	}
  36.  
  37. 	Point[] points = new Point[n];
  38. 	foreach (ref pt; points){
  39. 		pt.x = uniform01();
  40. 		pt.y = uniform01();
  41. 	}
  42.  
  43. 	double minLen = double.infinity;
  44. 	Point p1, p2;
  45.  
  46.  
  47. 	foreach (i, pt1; points[0..$-1]){
  48. 		foreach (j, pt2; points[i+1..$]){
  49. 			double len = sqrt((pt2.x - pt1.x)^^2 + (pt2.y - pt1.y)^^2);
  50.  
  51. 			if (len < minLen){
  52. 				minLen = len;
  53. 				p1 = pt1;
  54. 				p2 = pt2;
  55. 			}
  56. 		}
  57. 	}
  58. 	points.each!(pt => writefln("%s%s", pt, (p1 is pt) || (p2 is pt) ? " *" : "" ));
  59. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.d(5): Error: module iteration is in file 'std/algorithm/iteration.d' which cannot be read
import path[0] = /usr/include/d/ldc
import path[1] = /usr/include/d
stdout
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Standard output is empty
https://ideone.com/jx0Hk5
language:
D (ldc 1.12.0)
created:
9 years ago
visibility:
secret

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