Assume an input file (called "numbers.txt") contains a number on each non-blank line of the file. Read in the file and then print out the sum of all the numbers read. The sum should be rounded up to 1 decimal.

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Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.