writting a easy program of Dev C++幫我寫個程式...( 20 point)

如題

program description

A.... Write a program to simulate an a@b operation machine.
B.... The program will accept two integers from the keyboard.
C.... The @ operation is one of the four arithmetic operation namely '+', '-' ,'*', '/'
D.... The users will input 1,2,3,4 though the keyboard to signify their intended @
operation. Input of 1 stand for the '+' operation, 2 stand for '-' operation, 3
stand for the '*' operation and 4 stand for '/' operation.
E.... The program will output result of the operation together with a proper
expression such as 1+2=3 , if the input are 2 and3, and the + operation is
chosen.