Q. Let P be the postfix arithmetic expression: 7, 2,-, 1, 14, 1, 2, * Evaluate P using stack and showing the status of the stack at every step.
Answer =
2
Explanation :
1. Push 7 onto the stack.
2. Push 2 onto the stack.
3. Push - onto the stack.
3. Pop the top two values from the stack (2 and 7).
4. Perform the subtraction (7 - 2 = 5).
5. Push the result (5) back onto the stack.
6. Push 1 onto the stack.
7. Push 14 onto the stack.
8. Push 1 onto the stack.
9. Push 2 onto the stack.
10. Push * onto the stack.
11. Pop the top two values from the stack (2 and 1).
12. Perform the multiplication (1 * 2 = 2).
13. Push the result (2) back onto the stack.
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