Write the definition for a void function called toScreen. The function toScreen has one formal parameter called fileStream, which is of type ifstream. The precondition and postcondition for the function are as follows:
//Precondition: The stream fileStream has been connected
//to a file with a call to the member function open. The
//file contains a list of integers (and nothing else).
//Postcondition: The numbers in the file connected to
//fileStream have been written to the screen one per line.
//(This function does not dose the file.)
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