8a1c09e280
Stop using relative imports and add a go.mod file. Tested against Go 1.6 through Go pre-1.13, and gccgo.
49 lines
980 B
Go
49 lines
980 B
Go
// Example using pointers to member functions
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package main
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import "fmt"
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import . "member_pointer"
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func check(what string, expected float64, actual float64) {
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if expected != actual {
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panic(fmt.Sprintf("Failed: %s Expected: %f Actual; %f", what, expected, actual))
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}
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}
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func main() {
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// Get the pointers
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area_pt := Areapt()
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perim_pt := Perimeterpt()
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// Create some objects
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s := NewSquare(10)
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// Do some calculations
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check("Square area ", 100.0, Do_op(s, area_pt))
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check("Square perim", 40.0, Do_op(s, perim_pt))
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_ = GetAreavar()
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_ = GetPerimetervar()
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// Try the variables
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check("Square area ", 100.0, Do_op(s, GetAreavar()))
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check("Square perim", 40.0, Do_op(s, GetPerimetervar()))
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// Modify one of the variables
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SetAreavar(perim_pt)
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check("Square perimeter", 40.0, Do_op(s, GetAreavar()))
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// Try the constants
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_ = AREAPT
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_ = PERIMPT
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_ = NULLPT
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check("Square area ", 100.0, Do_op(s, AREAPT))
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check("Square perim", 40.0, Do_op(s, PERIMPT))
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}
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