Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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![Write a Java program for Evaluating Postfix Expression
1. Input a postfix expression from user.
2. Evaluate expression using double stack made of your own linked list.
3. Show the result of expression or error if incorrect.
Evaluating Postfix Expression
Evaluating Postfix Expression
Evaluating Postfix Expression
Input an expression:
2 10 + 9 6 - /
Input an expression:
2.0 10 + 9 6 - /
Input an expression:
2 10 + 9 - /
Result = 4.0
Result = 4.0
Result = Error
(Sample run of the program )
Note :
• Input expression will be a String. After the input, parse the string for numbers and operators.
Operands may be integers, and floats or doubles. Hence use a stack which can store doubles.
• A simple example is available at [ https://courses.cs.washington.edu/courses/cse143/12su/lectur
es/06-27/programs/Postfix.java ]. Modify it for input of expression from user and use of double
data type so that it should work for both integers and doubles.
• Postfix expression consists of numbers(integers/doubles), +-*/, and spaces such as "2 3.0 - 4 *"](https://content.bartleby.com/qna-images/question/7cec5cdc-478d-4005-8148-6d36ea9f910e/9dd5450b-7d02-488e-a40c-52b85a09a476/d9go00o_processed.jpeg)
Transcribed Image Text:Write a Java program for Evaluating Postfix Expression
1. Input a postfix expression from user.
2. Evaluate expression using double stack made of your own linked list.
3. Show the result of expression or error if incorrect.
Evaluating Postfix Expression
Evaluating Postfix Expression
Evaluating Postfix Expression
Input an expression:
2 10 + 9 6 - /
Input an expression:
2.0 10 + 9 6 - /
Input an expression:
2 10 + 9 - /
Result = 4.0
Result = 4.0
Result = Error
(Sample run of the program )
Note :
• Input expression will be a String. After the input, parse the string for numbers and operators.
Operands may be integers, and floats or doubles. Hence use a stack which can store doubles.
• A simple example is available at [ https://courses.cs.washington.edu/courses/cse143/12su/lectur
es/06-27/programs/Postfix.java ]. Modify it for input of expression from user and use of double
data type so that it should work for both integers and doubles.
• Postfix expression consists of numbers(integers/doubles), +-*/, and spaces such as "2 3.0 - 4 *"
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