Dart编程实例 - 实现多个接口
void main() {
Calculator c = new Calculator();
print("The gross total : ${c.ret_tot()}");
print("Discount :${c.ret_dis()}");
}
class Calculate_Total {
int ret_tot() {}
}
class Calculate_Discount {
int ret_dis() {}
}
class Calculator implements Calculate_Total,Calculate_Discount {
int ret_tot() {
return 1000;
}
int ret_dis() {
return 50;
}
}
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