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32 lines
533 B
32 lines
533 B
package money
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type Money struct {
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Currency Currency `json:"currency" bson:"currency"`
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Whole int `json:"whole" bson:"whole"`
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Decimal int `json:"decimal" bson:"decimal"`
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}
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// add x to y
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func Add(x, y Money) Money {
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x.Decimal += y.Decimal
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if x.Decimal >= 100 {
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x.Whole++
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x.Decimal -= 100
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}
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x.Whole += y.Whole
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return x
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}
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// subtract x from y
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func Subtract(x, y Money) Money {
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x.Decimal = y.Decimal - x.Decimal
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if x.Decimal < 0 {
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x.Whole++
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x.Decimal += 100
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}
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x.Whole = y.Whole - x.Whole
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return x
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}
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