A program reads data from a text file and stores it in a stack. The stack Stack is stored as a 1D array of up to 20 elements. The pointer TopOfStack stores the index of the last element stored in the stack. Write program code to extend the main program to: - take a filename as input from the user - call ReadData () with the input filename - call Calculate() - output the final total. (ii) Test your program twice with the file names: StackData.txt SecondStack.txt Take a screenshot of the output(s).

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