ASSUME S, T R are stacks. A is an array [1..14] of char; THE INPUT IS "datastructures". The MAXSTACK VALUES FOR R, S ARE 5 AND For T is 7. ALL THREE STACKS WILL CONTAIN CHARACTER DATA. ASSUME ch is a character variable. Also ASSUME that there is NO SPACE in the input. ClearStack (S);ClearStack (T); ClearStack(R ); FORI = 1 to 14 READ(A[1]); END FOR; I = 1; While I < 15 IF NOT FULLSTACK(R) PUSH(R, A[]) ELSE IF NOT FULLSTACK(S) PUSH(S, A[1]); ENDIF; IF (A[I ] = "u" OR A[] = "r") and (Not FullStack(T)) PUSH(T, A[]); ENDIF; I = 1 + 1; EndWhile; While Not EmptyStack (R) Pop (R, ch); Write (ch); If Not Fullstack(T) Push (T, ch); Endif: EndWhile; While Not EmptyStack(T) Pop (T, ch); Write (ch); EndWhile; output tracing

ASSUME S, T R are stacks. A is an array [1..14] of char; THE INPUT IS "datastructures". The MAXSTACK VALUES FOR R, S ARE 5 AND For T is 7. ALL THREE STACKS WILL CONTAIN CHARACTER DATA. ASSUME ch is a character variable. Also ASSUME that there is NO SPACE in the input. ClearStack (S);ClearStack (T); ClearStack(R ); FORI = 1 to 14 READ(A[1]); END FOR; I = 1; While I < 15 IF NOT FULLSTACK(R) PUSH(R, A[]) ELSE IF NOT FULLSTACK(S) PUSH(S, A[1]); ENDIF; IF (A[I ] = "u" OR A[] = "r") and (Not FullStack(T)) PUSH(T, A[]); ENDIF; I = 1 + 1; EndWhile; While Not EmptyStack (R) Pop (R, ch); Write (ch); If Not Fullstack(T) Push (T, ch); Endif: EndWhile; While Not EmptyStack(T) Pop (T, ch); Write (ch); EndWhile; output tracing

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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