mirror of
https://github.com/golang/go
synced 2024-11-18 00:04:43 -07:00
80 lines
1.1 KiB
Go
80 lines
1.1 KiB
Go
// run
|
|
|
|
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Test simultaneous assignment.
|
|
|
|
package main
|
|
|
|
var a, b, c, d, e, f, g, h, i int
|
|
|
|
func printit() {
|
|
println(a, b, c, d, e, f, g, h, i)
|
|
}
|
|
|
|
func testit(permuteok bool) bool {
|
|
if a+b+c+d+e+f+g+h+i != 45 {
|
|
print("sum does not add to 45\n")
|
|
printit()
|
|
return false
|
|
}
|
|
return permuteok ||
|
|
a == 1 &&
|
|
b == 2 &&
|
|
c == 3 &&
|
|
d == 4 &&
|
|
e == 5 &&
|
|
f == 6 &&
|
|
g == 7 &&
|
|
h == 8 &&
|
|
i == 9
|
|
}
|
|
|
|
func swap(x, y int) (u, v int) {
|
|
return y, x
|
|
}
|
|
|
|
func main() {
|
|
a = 1
|
|
b = 2
|
|
c = 3
|
|
d = 4
|
|
e = 5
|
|
f = 6
|
|
g = 7
|
|
h = 8
|
|
i = 9
|
|
|
|
if !testit(false) {
|
|
panic("init val\n")
|
|
}
|
|
|
|
for z := 0; z < 100; z++ {
|
|
a, b, c, d, e, f, g, h, i = b, c, d, a, i, e, f, g, h
|
|
|
|
if !testit(z%20 != 19) {
|
|
print("on ", z, "th iteration\n")
|
|
printit()
|
|
panic("fail")
|
|
}
|
|
}
|
|
|
|
if !testit(false) {
|
|
print("final val\n")
|
|
printit()
|
|
panic("fail")
|
|
}
|
|
|
|
a, b = swap(1, 2)
|
|
if a != 2 || b != 1 {
|
|
panic("bad swap")
|
|
}
|
|
|
|
a, b = swap(swap(a, b))
|
|
if a != 2 || b != 1 {
|
|
panic("bad swap")
|
|
}
|
|
}
|