| class Pet { } | |
| // 使用冒號來連接要繼承的類別 | |
| // Dog 繼承 Pet | |
| class Dog : Pet { } |
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| class Pet { } | |
| // 使用冒號來連接要繼承的類別 | |
| // Dog 繼承 Pet | |
| class Dog : Pet { } |