45 lines
923 B
Go
45 lines
923 B
Go
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package main
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import "fmt"
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func paintNeeded(width float64, height float64) (paintNeededCalculated float64, anError error) {
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area := width * height
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if width < 0.0 {
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return 0, fmt.Errorf("a width of %0.2f is invalid.", width)
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}
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if height < 0.0 {
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return 0, fmt.Errorf("a height of %0.2f is invalid.", height)
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}
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return area / 10.0, nil
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}
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func printListersNeeded(amount float64) {
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fmt.Printf("%.2f liters needed\n", amount)
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}
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func wallArea() {
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var amount, total float64
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amount, err := paintNeeded(4.2, 3.0)
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if err != nil {
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fmt.Println(err)
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} else {
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printListersNeeded(amount)
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}
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total += amount
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amount, err = paintNeeded(-5.2, 3.5)
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if err != nil {
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fmt.Println(err)
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} else {
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printListersNeeded(amount)
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}
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total += amount
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amount, err = paintNeeded(5.2, 5.0)
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if err != nil {
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fmt.Println(err)
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} else {
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printListersNeeded(amount)
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}
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total += amount
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fmt.Printf("Total: %.2f liters\n", total)
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}
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