Data commit

Task/Arithmetic-Integer/EMal/arithmetic-integer.emal

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+^|EMal has no divmod operator or built-in function,
+ |its interface can be easily emulated as shown below.
+ |The performace is worse than using / and % operators.
+ |^
+fun divmod = Pair by int dividend, int divisor
+  Pair result = int%int().named("quotient", "remainder")
+  result.quotient = dividend / divisor
+  result.remainder = dividend % divisor
+  return result
+end
+fun main = int by List args
+  int a, b
+  if args.length == 2
+    a = int!args[0]
+	b = int!args[1]
+  else
+    a = ask(int, "first number: ")
+    b = ask(int, "second number: ")
+  end
+  writeLine("sum:              " + (a + b))
+  writeLine("difference:       " + (a - b))
+  writeLine("product:          " + (a * b))
+  writeLine("integer quotient: " + (a / b)) # truncates towards 0
+  writeLine("remainder:        " + (a % b)) # matches sign of first operand
+  writeLine("exponentiation:   " + (a ** b))
+  writeLine("logarithm:        " + (a // b))
+  writeLine("divmod:           " + divmod(a, b))
+  return 0
+end
+exit main(Runtime.args)