Evaluate the following postfix expression using a stack. Show the cont – InterviewSolution

1.

Evaluate the following postfix expression using a stack. Show the contents of stack after execution of each operation:10,40,25,-,,15,4,,+

Answer»

Symbol	Operation	Stack	Result
10	Push(10)	10
40	Push(40)	10,40
25	Push(25)	10,40,25
-	Pop(25) Pop(40) Push(40-25) =15	10,15
*	Pop(15) Pop(10) Push(10*15) =150	150
15	Push(15)	150,15
4	Push(4)	150,15,4
*	Pop(4) Pop(15) Push(15*4)=60	150,60
+	Pop(60) Pop(150) Push(150+60)=210	210	210

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