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from module import LongInt

def main():
    # instantiate two LongInt objects
    first = LongInt('0')
    second = LongInt('0')
    
    # initialize input objects
    try:
        file = open('LongInts.txt', 'r')
        lines = file.readlines()
        file.close()
        
        for line in lines:
            line = line.strip()
            if line.isdigit():
                if first is None:
                    first = LongInt(line)
                elif second is None:
                    second = LongInt(line)
                    
                    # perform the arithmetic
                    result = first.add_num(second)
                    
                    # display the results
                    first.print_longint()
                    second.print_longint()
                    print("-----------------")
                    result.print_longint()
                    print("\n")
            else:
                print(f"Skipping invalid line: {line}")
                
                
    except IOError:
        print("Error: Unable to read the file.")

   
if __name__ == "__main__":
    main()