In C++ please right both programe sapetly.

Task B. Calc: A calculator program. We want to make a simple calculator that can add and subtract integers, and will accept arbitrarily long mathematical formulas composed of symbols +,- , and non-negative integer numbers. Imagine you have a file formula.txt with the summation formula such as: 100 50 - 25 e 1231 If you redirect the file into your program, it should compute and print the answer: s ./calc