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Converting an infix expression (e.g., a + b * c) to a postfix expression (e.g., abc*+) simplifies evaluation by computers. This is achieved using a stack to handle operator precedence and parentheses.
Example Code in Python
# Function to define operator precedencedef precedence(op):if op == '^':return 3elif op in ('*', '/'):return 2elif op in ('+', '-'):return 1else:return -1# Function to convert infix to postfixdef infix_to_postfix(expression):stack = [] # Stack to hold operatorspostfix = "" # Resultant postfix expressionfor char in expression:# If operand, add to postfixif char.isalnum():postfix += char# If '(', push to stackelif char == '(':stack.append(char)# If ')', pop until '(' is encounteredelif char == ')':while stack and stack[-1] != '(':postfix += stack.pop()stack.pop() # Remove '(' from stack# If operator, handle precedenceelse:while stack and precedence(char) <= precedence(stack[-1]):postfix += stack.pop()stack.append(char)# Pop remaining operators from the stackwhile stack:postfix += stack.pop()return postfix# Example usageexpression = "a+b*(c^d-e)^(f+g*h)-i"print("Postfix Expression:", infix_to_postfix(expression))コピーしました。✕コピー Infix to Postfix Expression - GeeksforGeeks
2025年9月15日 · Operators are handled using a stack so that precedence and associativity are maintained. How to Maintain Precedence and Associativity? To maintain operator precedence and …
geeksforgeeks.org の検索結果のみを表示Infix to Postfix Conversion using Stack in C++ - GeeksforGeeks
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The algorithm for converting an infix expression (where operators are between operands, e.g., 3 + 4 * 2) to a postfix expression (also known as Reverse Polish Notation, e.g., 3 4 2 * +) involves utilizing a …
Infix to Postfix Conversion using Stack in C++ - GeeksforGeeks
2025年7月23日 · C++ Program to Convert an Infix Expression to a Postfix Expression using a Stack The following program illustrates how we can convert an infix expression to a postfix expression using a …
Infix to Postfix Using Stack について掘り下げる
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