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  1.  
  2. class Ideone
  3. {
  4. public static void main (String[] args) {
  5. System.out.println(Math.atan2(+1,+1) * 180 / Math.PI);
  6. System.out.println(Math.atan2(+1,-1) * 180 / Math.PI);
  7. System.out.println(Math.atan2(-1,-1) * 180 / Math.PI);
  8. System.out.println(Math.atan2(-1,+1) * 180 / Math.PI);
  9. }
  10. }
Success #stdin #stdout 0.07s 380160KB
stdin
Standard input is empty
stdout
45.0
135.0
-135.0
-45.0