C#•2y ago

❔ interface

Always get error with double inheritance help please

35 Replies

hercules_x_x•2y ago

ero•2y ago

look at what the error says?

hercules_x_x•2y ago

'Circle' does not implement interface member 'IShape_C.circumference()' [hw6]csharp(CS0535) why it cant

ero•2y ago

because it doesn't there is no circumference method in Circle

hercules_x_x•2y ago

how to make it dose circumference?

ero•2y ago

add a method called circumference to Circle

hercules_x_x•2y ago

but it must be done with constuctor that the teacher request

ero•2y ago

you already have a constructor that one is fine

hercules_x_x•2y ago

ok ok guid me so i will add method

ero•2y ago

you need a method called circumference in Circle

hercules_x_x•2y ago

ok ok wait

hercules_x_x•2y ago

already

ero•2y ago

already what?

hercules_x_x•2y ago

ohhhhh

ero•2y ago

i don't see a method called circumference

hercules_x_x•2y ago

i see isee wrong type lol

hercules_x_x•2y ago

work amazing

hercules_x_x•2y ago

thanks a lot ❤️

ero•2y ago

👍

hercules_x_x•2y ago

btw any idea why cant use double inheritance with abstract got me confused

ero•2y ago

what do you mean?

hercules_x_x•2y ago

or maybe can lol so there is abstract and interface

ero•2y ago

mhm

hercules_x_x•2y ago

in abstract cant use double inheritance can i know why

MODiX•2y ago

Ero#1111

REPL Result: Success

interface I1 { }
interface I2 { }
abstract class C : I1, I2 { }

interface I1 { }
interface I2 { }
abstract class C : I1, I2 { }

Compile: 379.450ms | Execution: 30.491ms | React with ❌ to remove this embed.

ero•2y ago

you can

hercules_x_x•2y ago

but for class I1 and I2 u still using interface

ero•2y ago

oh, yeah you can't inherit from 2 classes at once

hercules_x_x•2y ago

abstract I1 { } abstract I2 { } abstract class C : I1, I2 { } can be like that

ero•2y ago

only 1 class and/or multiple interfaces

hercules_x_x•2y ago

may i know why or no reason just like that

ero•2y ago

there's good reasons for that but i don't know enough to explain it well

hercules_x_x•2y ago

ahh ok ok advance here i come lol thanks a lot for everything 🙏

bookuha•2y ago

Multiple inheritance caused many problem in the past So it was decided to move on interfaces and eliminate multiple inheritance in c# You have to always remember if there is no conflict caused by having similar member in your parent classes

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ interface