mirror of
https://github.com/golang/go
synced 2024-11-22 11:44:41 -07:00
138 lines
2.4 KiB
Go
138 lines
2.4 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import Integer "integer"
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type Int Integer.Integer;
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const (
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sa = "991";
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sb = "2432902008176640000"; // 20!
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sc = "93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000"; // 100!
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)
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var (
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m, z, p,
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a, b, c,
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a_a, a_b, a_c, b_b, b_c, c_c, a_b_c
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Int
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)
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func CHECK(p bool) {
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if !p {
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panic "CHECK failed\n";
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}
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}
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func Init() {
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m = Integer.FromInt(-1);
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z = Integer.FromInt(0);
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p = Integer.FromInt(1);
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a = Integer.FromString(sa);
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b = Integer.FromString(sb);
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c = Integer.FromString(sc);
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a_a = Integer.FromInt(991 + 991);
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a_b = Integer.FromString("2432902008176640991");
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a_c = Integer.FromString("93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000991");
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}
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func TestConv() {
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print "TestConv\n";
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CHECK(a.eql(Integer.FromInt(991)));
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CHECK(b.eql(Integer.Fact(20)));
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CHECK(c.eql(Integer.Fact(100)));
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CHECK(a.ToString() == sa);
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CHECK(b.ToString() == sb);
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CHECK(c.ToString() == sc);
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// also tested much via TestFact
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}
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func TestAdd() {
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print "TestAdd\n";
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CHECK(z.add(z).eql(z));
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CHECK(a.add(z).eql(a));
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CHECK(z.add(a).eql(a));
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CHECK(c.add(z).eql(c));
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CHECK(z.add(c).eql(c));
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CHECK(m.add(p).eql(z));
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CHECK(a.add(a).eql(a_a));
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CHECK(a.add(b).eql(a_b));
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CHECK(a.add(c).eql(a_c));
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// needs more
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}
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func TestSub() {
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print "TestSub\n";
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CHECK(z.sub(z).eql(z));
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CHECK(a.sub(z).eql(a));
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CHECK(z.sub(a).eql(a.neg()));
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CHECK(c.sub(z).eql(c));
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CHECK(z.sub(c).eql(c.neg()));
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CHECK(p.sub(m).eql(p.add(p)));
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CHECK(a.sub(a).eql(z));
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// needs more
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}
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func TestMul() {
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print "TestMul\n";
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// tested much via TestFact for now
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}
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func TestDiv() {
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print "TestDiv\n";
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// no div implemented yet
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}
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func TestMod() {
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print "TestMod\n";
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// no mod implemented yet
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}
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func TestFact() {
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print "TestFact\n";
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for n := 990; n < 1010; n++ {
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f := Integer.Fact(n);
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CHECK(Integer.FromString(f.ToString()).eql(f));
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}
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}
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func main() {
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Init();
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TestConv();
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TestAdd();
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TestSub();
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TestMul();
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TestDiv();
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TestMod();
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TestFact();
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print "PASSED\n";
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}
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