Program Plan : Use stack implementation as provided in figure 12.08 of the book. Define a function calculate as mentioned. Inside this function use switch statement to evaluate value of operands as per operator. Define function evaluatePostfix() that take one argument exp which a pointer of type char. Inside this function create a stack pointer. Further scan character of expression in exp pointer character by character and then use push, pop and calculate functions to evaluate the expression and return final value. Define main function. Inside main read postfix expression from user and call evaluatePostfix function using the read expression. Program Description : The followingprograms evaluate the postfix expression using stacks.

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Chapter 12, Problem 12.13E

Program Plan Intro

Program Plan:

Use stack implementation as provided in figure 12.08 of the book.

Define a function calculate as mentioned. Inside this function use switch statement to evaluate value of operands as per operator.

Define function evaluatePostfix() that take one argument exp which a pointer of type char. Inside this function create a stack pointer.

Further scan character of expression in exp pointer character by character and then use push, pop and calculate functions to evaluate the expression and return final value.

Define main function. Inside main read postfix expression from user and call evaluatePostfix function using the read expression.

Program Description:

The followingprograms evaluate the postfix expression using stacks.

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