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https://blog.abyz.ir/1397/10/%d9%84%d8%b0%d8%aa-%d8%a8%d8%b1%d9%86%d8%a7%d9%85%d9%87%e2%80%8c%d9%86%d9%88%db%8c%d8%b3%db%8c-%da%a9%d8%af-%d9%85%d9%88%d8%b1%d9%88%d8%ab%db%8c/
لذت برنامه‌نویسی: کد موروثی