Please complete in C++

Problem C: Big (bad) integer calculator v2.0 (5 points extra credit) In part B you made a calculator that detected the pattern: [integer] [operator] [integer] [operator] ... [integer] [# symbol]. A case we do not expect you to handle for part B is if someone just entered a single '#'. For this extra credit problem, handle this input, along with all the other normal computation. If the user enters just '#', display "Error". Hint: you might have to look up how to convert between different types. Example 1 (user input underlined): Enter a formula: Error Example 2 (user input underlined): Enter a formula: 2+3*2/5000+9-4# Example 3 (user input underlined): Enter a formula: 42# 42 Problem C: Big (bad) integer calculator v2.0 (5 points extra credit) In part B you made a calculator that detected the pattern: [integer] [operator] [integer] [operator] ... [integer] [# symbol]. A case we do not expect you to handle for part B is if someone just entered a single '#'. For this extra credit problem, handle this input, along with all the other normal computation. If the user enters just '#', display "Error". Hint: you might have to look up how to convert between different types. Example 1 (user input underlined): Enter a formula: Error Example 2 (user input underlined): Enter a formula: 2+3*2/5000+9-4# Example 3 (user input underlined): Enter a formula: 42# 42