Question

Evaluate the following postfix expression using a stack and show the contents of the stack after execution of each operation 5, 11, -, 6, 8, +, 12, *, /

Answer 1

SNo	Symbo	Action taken	Stack	Intermediate output
1	5	operand, push	5
2	11	operand, push	5,11
3	-	operator, pop twice		5-11=-6
		Evaluate and push back	6
4	6	operand, push	6,-6
5	8	operand, push	6,-6,8
6	+	operator, pop twice	6	-6+8=-14
		Evaluate and push back	6,14
7	12	operand, push	6,14,12
8	*	operator, pop twice	6	12*14=168
		Evaluate and push back	6,168
9	/	operator, pop twice		168/6
10		pop all	-1/28