{"id":8361,"date":"2023-11-03T08:07:39","date_gmt":"2023-11-03T02:37:39","guid":{"rendered":"https:\/\/python-programs.com\/?p=8361"},"modified":"2023-11-10T12:15:34","modified_gmt":"2023-11-10T06:45:34","slug":"program-to-reverse-a-string-using-a-stack-data-structure-in-c-and-python","status":"publish","type":"post","link":"https:\/\/python-programs.com\/program-to-reverse-a-string-using-a-stack-data-structure-in-c-and-python\/","title":{"rendered":"Program to Reverse a String using a Stack Data Structure in C++ and Python"},"content":{"rendered":"
Strings:<\/strong><\/p>\n A string data type is used in most computer languages for data values that are made up of ordered sequences of characters, such as “hello world.” A string can include any visible or unseen series of characters, and characters can be repeated. The length of a string is the number of characters in it, and “hello world” has length 11 – made up of 10 letters and 1 space. The maximum length of a string is usually restricted. There is also the concept of an empty string, which includes no characters and has a length of zero.<\/p>\n A string can be both a constant and a variable. If it is a constant, it is commonly expressed as a string of characters surrounded by single or double quotes.<\/p>\n Stack:<\/strong><\/p>\n Stacking objects means putting them on top of one another in the English language. This data structure allocates memory in the same manner.<\/p>\n Data structures are essential for organizing storage in computers so that humans can access and edit data efficiently. Stacks were among the first data structures to be defined in computer science. In layman\u2019s terms, a stack is a linear accumulation of items. It is a collection of objects that provides fast last-in, first-out (LIFO) insertion and deletion semantics. It is a modern computer programming and CPU architecture array or list structure of function calls and parameters. Elements in a stack are added or withdrawn from the top of the stack in a \u201clast in, first out\u201d order, similar to a stack of dishes at a restaurant.<\/p>\n Unlike lists or arrays, the objects in the stack do not allow for random access.<\/p>\n Given a string the task is to reverse the given string using stack data structure in C++ and python.<\/p>\n Examples:<\/strong><\/p>\n Example1:<\/strong><\/p>\n Input:<\/strong><\/p>\n Output:<\/strong><\/p>\n Example2:<\/strong><\/p>\n Input:<\/strong><\/p>\n Output:<\/strong><\/p>\n Example3:<\/strong><\/p>\n Input:<\/strong><\/p>\n Output:<\/strong><\/p>\n Drive into Python Programming Examples<\/a> and explore more instances related to python concepts so that you can become proficient in generating programs in Python Programming Language.<\/p>\n It is critical to concentrate on the algorithm in order to develop better code. This could be the initial step in selecting a problem; one must consider the optimal algorithm before moving on to the implementation and coding.<\/p>\n The following steps may be useful:<\/p>\n Below is the implementation:<\/strong><\/p>\n Output:<\/strong><\/p>\n All the characters present in the string get reversed using the above approach(including space characters).<\/p>\n We use deque to copy all elements from the givenstring(which performs the same operation as a stack in this case)<\/p>\n We use the join method to join all the characters of the given string after reversing.<\/p>\n Below is the implementation:<\/strong><\/p>\n Output:<\/strong><\/p>\n Related Programs<\/strong>:<\/p>\n Strings: A string data type is used in most computer languages for data values that are made up of ordered sequences of characters, such as “hello world.” A string can include any visible or unseen series of characters, and characters can be repeated. The length of a string is the number of characters in it, …<\/p>\ngiven string =\"hellothisisBTechGeeks\"<\/pre>\n
Printing the given string before reversing : hellothisisBTechGeeks\r\nPrinting the given string after reversing : skeeGhceTBsisihtolleh<\/pre>\n
given string =\"skyisbluieIFC\"<\/pre>\n
Printing the given string before reversing : skyisbluieIFC\r\nPrinting the given string after reversing : CFIeiulbsiyks<\/pre>\n
given string=\"cirusfinklestein123\"<\/pre>\n
Printing the given string before reversing : cirusfinklestein123\r\nPrinting the given string after reversing : 321nietselknifsuric<\/pre>\n
Program to Reverse a String using a Stack Data Structure in C++ and Python<\/h2>\n
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1)Reversing the string using stack<> function in C++<\/h3>\n
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#include <bits\/stdc++.h>\r\nusing namespace std;\r\n\/\/ function which reverses the given string using stack\r\nvoid revString(string& givenstr)\r\n{\r\n \/\/ Taking a empty stack of character type\r\n stack<char> st;\r\n\r\n \/\/ Traversing the given string using for loop\r\n for (char character : givenstr) {\r\n \/\/ adding each element of the given string to stack\r\n st.push(character);\r\n }\r\n\r\n \/\/ popping all elements from the stack and\r\n \/\/ replacing the elements of string with the popped\r\n \/\/ element\r\n for (int i = 0; i < givenstr.length(); i++) {\r\n \/\/ intializing the ith character of string with the\r\n \/\/ top element of the stack\r\n givenstr[i] = st.top();\r\n \/\/ popping the top element from the stack using\r\n \/\/ pop() function\r\n st.pop();\r\n }\r\n}\r\n\r\nint main()\r\n{\r\n \/\/ given string\r\n string givenstr = \"hellothisisBTechGeeks\";\r\n \/\/ printing the string before reversing elements\r\n cout << \"Printing the given string before reversing : \"\r\n << givenstr << endl;\r\n revString(givenstr);\r\n cout << \"Printing the given string after reversing : \"\r\n << givenstr << endl;\r\n\r\n return 0;\r\n}<\/pre>\n
Printing the given string before reversing : hellothisisBTechGeeks\r\nPrinting the given string after reversing : skeeGhceTBsisihtolleh<\/pre>\n
2)Reversing the string using deque in Python<\/h3>\n
from collections import deque\r\n# given string\r\ngivenstr = \"HellothisisBTechGeeks\"\r\n# Printing the given string before reversing\r\nprint(\"Printing the given string before reversing : \")\r\nprint(givenstr)\r\n# creating the stack from the given string\r\nst = deque(givenstr)\r\n\r\n# pop all characters from the stack and join them back into a string\r\ngivenstr = ''.join(st.pop() for _ in range(len(givenstr)))\r\n\r\n# Printing the given string after reversing\r\nprint(\"Printing the given string after reversing : \")\r\nprint(givenstr)\r\n<\/pre>\n
Printing the given string before reversing : \r\nHellothisisBTechGeeks\r\nPrinting the given string after reversing : \r\nskeeGhceTBsisihtolleH<\/pre>\n
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