Find letter's position in Alphabet using Bit operation in C++

In this problem, we are given a string str consisting of english alphabets. Our task is to find the letter's position in the Alphabet using the Bit operation. 

Problem Description: Here, we will return the position of each character of the string as it is in english alphabets.

The characters of the string are case-insensitive i.e. “t” and “T” are treated the same.

Let’s take an example to understand the problem, 

Input: str = “Tutorialspoint”

Output: 20 21 20 15 18 9 1 12 19 16 15 9 14 20 

Solution Approach

A simple solution to find a character's position is by finding its logical AND operation with 31.

Program to illustrate the working of our solution,

Example

Live Demo

#include <iostream>
using namespace std;

void findLetterPosition(string str, int n) {
   
   for (int i = 0; i < n; i++) {
      cout<<(str[i] & 31) << " ";
   }
}

int main() {
   
   string str = "TutorialsPoint";
   int n = str.length();
   cout<<"The letters position in string "<<str<<" is \n";
   findLetterPosition(str, n);

   return 0;
}

Output

The letters position in string TutorialsPoint is
20 21 20 15 18 9 1 12 19 16 15 9 14 20

sudhir sharma

Updated on 25-Jan-2021 05:12:08

• Related Questions & Answers
• Replace a letter with its alphabet position JavaScript
• Swapping letter with succeeding alphabet in JavaScript
• Convert number to alphabet letter JavaScript
• Find position of the only set bit in C++
• 8086 program to reverse 16 bit number using 8 bit operation
• 8086 program to reverse 8 bit number using 8 bit operation
• Write a Golang program to find odd and even numbers using bit operation
• Position of rightmost set bit in C++
• Position of rightmost different bit in C++
• Golang Program to find the position of the rightmost set bit
• Find position of left most dis-similar bit for two numbers in C++
• Position of rightmost common bit in two numbers in C++
• Find Duplicates of array using bit array in Python
• Find Duplicates of array using bit array in C++
• Update the bit in the given position or Index of a number using C++