3 // Copyright 2009 The Go Authors. All rights reserved.
4 // Use of this source code is governed by a BSD-style
5 // license that can be found in the LICENSE file.
11 func pow10(pow int) float64 {
13 return 1 / pow10(-pow)
16 return pow10(pow-1) * 10
21 func close(da float64, ia, ib int64, pow int) bool {
22 db := float64(ia) / float64(ib)
25 if da == 0 || db == 0 {
26 if da == 0 && db == 0 {
48 if !close(0., 0, 1, 0) {
49 print("0. is ", 0., "\n")
51 if !close(+10., 10, 1, 0) {
52 print("+10. is ", +10., "\n")
54 if !close(-210., -210, 1, 0) {
55 print("-210. is ", -210., "\n")
58 if !close(.0, 0, 1, 0) {
59 print(".0 is ", .0, "\n")
61 if !close(+.01, 1, 100, 0) {
62 print("+.01 is ", +.01, "\n")
64 if !close(-.012, -12, 1000, 0) {
65 print("-.012 is ", -.012, "\n")
68 if !close(0.0, 0, 1, 0) {
69 print("0.0 is ", 0.0, "\n")
71 if !close(+10.01, 1001, 100, 0) {
72 print("+10.01 is ", +10.01, "\n")
74 if !close(-210.012, -210012, 1000, 0) {
75 print("-210.012 is ", -210.012, "\n")
78 if !close(0E+1, 0, 1, 0) {
79 print("0E+1 is ", 0E+1, "\n")
81 if !close(+10e2, 10, 1, 2) {
82 print("+10e2 is ", +10e2, "\n")
84 if !close(-210e3, -210, 1, 3) {
85 print("-210e3 is ", -210e3, "\n")
88 if !close(0E-1, 0, 1, 0) {
89 print("0E-1 is ", 0E-1, "\n")
91 if !close(+0e23, 0, 1, 1) {
92 print("+0e23 is ", +0e23, "\n")
94 if !close(-0e345, 0, 1, 1) {
95 print("-0e345 is ", -0e345, "\n")
98 if !close(0E1, 0, 1, 1) {
99 print("0E1 is ", 0E1, "\n")
101 if !close(+10e23, 10, 1, 23) {
102 print("+10e23 is ", +10e23, "\n")
104 if !close(-210e34, -210, 1, 34) {
105 print("-210e34 is ", -210e34, "\n")
108 if !close(0.E1, 0, 1, 1) {
109 print("0.E1 is ", 0.E1, "\n")
111 if !close(+10.e+2, 10, 1, 2) {
112 print("+10.e+2 is ", +10.e+2, "\n")
114 if !close(-210.e-3, -210, 1, -3) {
115 print("-210.e-3 is ", -210.e-3, "\n")
118 if !close(.0E1, 0, 1, 1) {
119 print(".0E1 is ", .0E1, "\n")
121 if !close(+.01e2, 1, 100, 2) {
122 print("+.01e2 is ", +.01e2, "\n")
124 if !close(-.012e3, -12, 1000, 3) {
125 print("-.012e3 is ", -.012e3, "\n")
128 if !close(0.0E1, 0, 1, 0) {
129 print("0.0E1 is ", 0.0E1, "\n")
131 if !close(+10.01e2, 1001, 100, 2) {
132 print("+10.01e2 is ", +10.01e2, "\n")
134 if !close(-210.012e3, -210012, 1000, 3) {
135 print("-210.012e3 is ", -210.012e3, "\n")
138 if !close(0.E+12, 0, 1, 0) {
139 print("0.E+12 is ", 0.E+12, "\n")
141 if !close(+10.e23, 10, 1, 23) {
142 print("+10.e23 is ", +10.e23, "\n")
144 if !close(-210.e33, -210, 1, 33) {
145 print("-210.e33 is ", -210.e33, "\n")
148 if !close(.0E-12, 0, 1, 0) {
149 print(".0E-12 is ", .0E-12, "\n")
151 if !close(+.01e23, 1, 100, 23) {
152 print("+.01e23 is ", +.01e23, "\n")
154 if !close(-.012e34, -12, 1000, 34) {
155 print("-.012e34 is ", -.012e34, "\n")
158 if !close(0.0E12, 0, 1, 12) {
159 print("0.0E12 is ", 0.0E12, "\n")
161 if !close(+10.01e23, 1001, 100, 23) {
162 print("+10.01e23 is ", +10.01e23, "\n")
164 if !close(-210.012e33, -210012, 1000, 33) {
165 print("-210.012e33 is ", -210.012e33, "\n")
168 if !close(0.E123, 0, 1, 123) {
169 print("0.E123 is ", 0.E123, "\n")
171 if !close(+10.e+23, 10, 1, 23) {
172 print("+10.e+234 is ", +10.e+234, "\n")
174 if !close(-210.e-35, -210, 1, -35) {
175 print("-210.e-35 is ", -210.e-35, "\n")
178 if !close(.0E123, 0, 1, 123) {
179 print(".0E123 is ", .0E123, "\n")
181 if !close(+.01e29, 1, 100, 29) {
182 print("+.01e29 is ", +.01e29, "\n")
184 if !close(-.012e29, -12, 1000, 29) {
185 print("-.012e29 is ", -.012e29, "\n")
188 if !close(0.0E123, 0, 1, 123) {
189 print("0.0E123 is ", 0.0E123, "\n")
191 if !close(+10.01e31, 1001, 100, 31) {
192 print("+10.01e31 is ", +10.01e31, "\n")
194 if !close(-210.012e19, -210012, 1000, 19) {
195 print("-210.012e19 is ", -210.012e19, "\n")