Integrate the infix to postfix converter from one of the earlier projects into the expression evaluator of the case study. Thus, the input to the program is a purported infix expression, and its...

Integrate the infix to postfix converter from one of the earlier projects into the expression evaluator of the case study. Thus, the input to the program is a purported infix expression, and its output is either its value or an error message. The program’s main components are the converter and the evaluator. If the converter detects a syntax error, the evaluator is not run. Thus, the evaluator can assume that its input is a syntactically correct postfix expression (which may still contain semantic errors, such as the attempt to divide by 0).