Programming II Bracket matching

Β Assignment: Write a program that determines if a string contains a balanced set of brackets. Brackets consist of the pairs ( ), [ ], and { }. A string is a sequence of characters containing no white space. White space is a sequence of one or more blank characters, new line characters, or tab characters. A string is balanced if an opening bracket, (, [, or { is matched by the corresponding closing bracket, }, ], or ). Brackets are matched in a last-in-first-out order. If an opening curly brace, {, appeared in the string then the next bracket in the string must be a closing curly brace }. Any sequence of characters that are not brackets can appear between the opening and closing brackets. Prohibition: Use of the C++ Standard Template Library is prohibited in the implementation of this project. Program Files: Project 2 consists of files p02.cpp, Stack02.h, Stack02.cpp, and p02make. Project file names are exactly as given. Failure to employ the foregoing names will result in a score of zero (0) for this project Project files must be stored in the root directory of your student account. Failure to store project files in the root directory of your student account will result in a score of zero (0) for this project. File Description p02.cpp File p02.cpp contains functions that process command line arguments and distinguish strings having balanced brackets. Stack02.h File Stack02.h defines class Stack. Class Stack implements a character stack by dynamically allocating an array of characters. Class Stack is a concrete class and is not implemented via a template. Stack02.cpp File Stack02.cpp contains the implementation of member functions of class Stack. p02make File p02make contains instructions for the UNIX utility make. Instructions in file p02make direct the creation of program p02. Command Line: Project 2 can be invoked with zero, one, or two program parameters. The first program parameter is the input file name. The second parameter is the output file name. Sample command lines together with corresponding actions by program p02 are shown below. Boldfaced type indicates data entered at the keyboard by the user. $ p02 Enter the input file name: i02.dat Enter the output file name: o02.dat $ p02 i02.dat Enter the output file name: o02.dat $ p02 i02.dat o02.dat Input File: File i02.dat in the class directory ~tt/cs2613/ contains a list of representative identifiers. Refer to Figure 1. Input file format. Output File: Program p02 produces file o02.dat. File o02.dat shown in Figure 2 is the output produced by program p02 given the input file shown in Figure 1. Programming II Bracket matching CMSC 2613 Project p02 2 Figure 1. Input file format (({}[{(){}}])) (({}[{(){}}]}) (o(t{b}m[s{t(f)s{t}d}f]s)p)us (I(l{e}e[a{m(a)h{t}f}j]k}s)x Figure 2. Output file format (({}[{(){}}])) is balanced. (({}[{(){}}]}) is not balanced. (o(t{b}m[s{t(f)s{t}d}f]s)p)us is balanced. (I(l{e}e[a{m(a)h{t}f}j]k}s)x is not balanced. Algorithm: bool isBalanced(const string& candidate) { Stack S; try { for all characters, 𝑐𝑐𝑖𝑖, of string candidate in the range 0 ≀ 𝑖𝑖 < 𝑛𝑛, where 𝑛𝑛 is the number of characters in string candidate do if 𝑐𝑐𝑖𝑖 is an opening bracket, one of β€˜(β€˜, β€˜[β€˜, or β€˜{β€˜ then push it on Stack S; if 𝑐𝑐𝑖𝑖 is a closing bracket, one of β€˜)β€˜, β€˜]β€˜, or β€˜}β€˜ then 1. pop character 𝑐𝑐𝑗𝑗 Stack S and 2. Here 𝑐𝑐𝑖𝑖is the closing bracket and 𝑐𝑐𝑗𝑗 is the opening bracket. Determine if 𝑐𝑐𝑗𝑗 is the corresponding opening bracket for which character 𝑐𝑐𝑖𝑖 is the closing bracket. If 𝑐𝑐𝑖𝑖 and 𝑐𝑐𝑗𝑗 are a matched pair do nothing. If ci and cj are mismatched then return false, indicating that the candidate is not balanced. } catch(StackEmptyException) { return false; } return true if stack S is empty, false otherwise; }
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