c++
21.(12 pts) Write a void function definition that is described below: .The name of the void function is Openlnput. .The function has one parameter- an input file stream. . The function is to: a) Prompt the user for the name of an input file and read it. b) Open the file. c) If the file did not open successfully, print out a message stating as such, reset the input stream variable scode to do this is
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