Super simple multi-state Calculator

Exam 4

1. Compile an operation parent class

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; namespace polymorphism calculator {// <summary> /// calculate the parent class /// </Summary> class operation {public int NUMA {Get; set ;} public int numb {Get; set;} public operation (int numa, int numb) {This. NUMA = NUMA; this. numb = numb;} Public Virtual int getres () {return 0 ;}}}

Ii. Write the class for addition, subtraction, multiplication, division, and inherit from the operation class

Add

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; namespace polymorphism calculator {class Add: Operation {public add (int numa, int numb): Base (NUMA, numb) {} public override int getres () {return base. numb + NUMA ;}}}

Subtraction

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; namespace polymorphism calculator {class Jian: Operation {public Jian (int numa, int numb): Base (NUMA, numb) {} public override int getres () {return base. NUMA-Numb ;}}}

Multiplication

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; namespace polymorphism calculator {class Ji: Operation {public Ji (int numa, int numb): Base (NUMA, numb) {} public override int getres () {return base. NUMA * numb ;}}}

Division

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; namespace polymorphism calculator {class Div: Operation {public Div (int numa, int numb): Base (NUMA, numb) {} public override int getres () {return base. NUMA/numb ;}}}

Iii. Write main

Using system; using system. collections. generic; using system. LINQ; using system. text; using system. threading. tasks; using polymorphism calculator; namespace c09 polymorphism calculator {class program {static void main (string [] ARGs) {// polymorphism is based on inheritance // finding the parent class // finding the common method of the subclass // finding the same method of each subclass, with different implementation consoles. writeline ("Enter the first number"); int NUMA = int. parse (console. readline (); console. writeline ("enter the second number"); int numb = int. parse (console. readline (); // console. writeline ("Enter the operator: 1. add 2. 3. multiply by 4. except "); string opt = console. readline (); operation = NULL; Switch (OPT) {Case "1": Operation = new add (NUMA, numb); break; Case "2 ": operation = new Jian (NUMA, numb); break; Case "3": Operation = new JI (NUMA, numb); break; Case "4 ": operation = new Div (NUMA, numb); break;} console. writeline (operation. getres (); console. readkey ();}}}

Okay.