An important application area of stacks is in the parsing phase in compilers. Evaluate the following postfix expression using a stack: (NB: show your workings step by step) 5 9 6 + 4 2 * * 7 + 3*+
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An important application area of stacks is in the parsing phase in compilers. Evaluate the following postfix expression using a stack: (NB: show your workings step by step)
5 9 6 + 4 2 * * 7 + 3*+
Step by step
Solved in 4 steps with 2 images
- Problem Statement: Recall the concepts of stacks. Implement a stack using arrays. Build a program that takes an infix statement and converts it to a postfix statement. If the statement is incorrect the program should inform the user that the input statement is incorrect. Otherwise it should return the postfix expression. After the statement has been successfully converted, the program should then evaluate this postfix expression and return the result. Draw the sequence of stack configurations in the evaluation of the following postfix expression: 3 5 5 * + 4 7 + / 6 *void fun1() { float a; void fun2() { int b, c; The calling sequence for this program for execution to reach fun2 is main calls fun3 void fun3() { float d; fun3 calls funl funl calls funl funl calls fun2 void main() { char e, f, g; Assume that the above program is implemented using the shallow-access method using a stack for each variable name. Show the stacks for the time of the execution of fun2, assuming execution found its way to that point through the sequence of calls shown above
- Complete the following ():a. A stack is used by the system when a function call is madeb. A stack can become full during program executiongiven code #include <stdio.h>#include <stdlib.h> /* typical C boolean set-up */#define TRUE 1#define FALSE 0 typedef struct StackStruct{int* darr; /* pointer to dynamic array */int size; /* amount of space allocated */int inUse; /* top of stack indicator - counts how many values are on the stack */} Stack; void init (Stack* s){s->size = 2;s->darr = (int*) malloc ( sizeof (int) * s->size );s->inUse = 0;} void push (Stack* s, int val){/* QUESTION 7 *//* check if enough space currently on stack and grow if needed */ /* add val onto stack */s->darr[s->inUse] = val;s->inUse = s->inUse + 1;} int isEmpty (Stack* s){if ( s->inUse == 0)return TRUE;elsereturn FALSE;} int top (Stack* s){return ( s->darr[s->inUse-1] );} /* QUESTION 9.1 */void pop (Stack* s){if (isEmpty(s) == FALSE)s->inUse = s->inUse - 1;} void reset (Stack* s){/* Question 10: how to make the stack empty? */ } int main (int argc, char** argv){Stack st1; init (&st1); push…Describe stack segment.
- Two stacks S1 and S2 can be implemented using one array. Write procedures: PopS1(Stack), PushS1(Stack,x), PopS2 (Stack), PushS2(Stack,x). The procedures should not declare an overflow unless every slot in the array is used.Code example of stack winding and unwinding in c#.Briefly explain stack segment
- In Python:Two stacks S1 and S2 can be implemented using one array. Write procedures: PopS1(Stack), PushS1(Stack,x), PopS2 (Stack), PushS2(Stack,x). The procedures should not declare an overflow unless every slot in the array is used.Solve this problem of DSA using C language (using arrays) Problem Statement: Recall the concepts of stacks. Implement a stack using arrays. Build a program that takes an infix statement and converts it to a postfix statement. If the statement is incorrect the program should inform the user that the input statement is incorrect. Otherwise it should return the postfix expression. After the statement has been successfully converted, the program should then evaluate this postfix expression and return the result.Write code to A Stack Class Example: Decimal to Multiple-Bases Conversion