How to Sort a String in C++?

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Rearranging an array’s elements logically is known as sorting in C++. You can order the highest to lowest or lowest to highest here. For example, the smallest or maximum element is one of many issues that can be resolved by sorting an unsorted array. In this article, we will look into sorting algorithms to sort a string in C++.

Sort String in C++

How To Sort A String In C++ | 4 Ways

Given below are some of the ways to sort a string in C++.

By Bubble Sort 

In terms of sorting algorithms, bubble sorting is one of the best. In this sorting method, you can start by comparing the array’s first two elements to see if the first is greater than the second one. If it is, swap the two and then move on to the next element. Up until the array’s finding, this operation will keep repeating.

Bubble Sorting

These examples include 12, 3, 1, 5, 18, 10, 7, and 35. To sort this array, you have to use two loops, the first from 0 to 8 and the second repeating from i+1 to 8. ‘j’ will be at index 1, when ‘i’ is at index 0, and ‘j’ will be at index 0+1. As a result, there will be a comparison between ‘element 0’ and ‘element 1’.

The switching will happen if the element at index 1 is smaller than at index 0. Likewise, each element will have a comparison with the subsequent element individually, and so on, until the final element.

Final Output 

Bubble Sorting Output

By Selection Sorting

You can locate the smallest element using the selection sorting technique by comparing it to the other elements. It is then sorted at the top of the array. The array is split in half, with the sorted subarray on the left and the unsorted subarray on the right. 

Selection Sorting

Selection Sorting

From 0 to num-1, the first for loop will repeat. The first element is set to the minor variables inside the for loop block, and the element’s index is assigned to the P variable.

The loop contains an if statement that instructs you to assign the element to the minor variables if arr[j] is less than the minimum element and to assign the index of that element to P if it is less than the minimum element.

We will replace arr[i] with arr[P] because P allocates the index. We will print the sorted array once the swapping is complete.

Final Output 

Selection Sorting Output

By Insertion Sort

This sorting method compares items to their prototypes to determine their order. The comparison of the second and first elements serves as the starting point. In this case, you will switch the elements if the second element is smaller than the first.

Insertion Sorting

In this example, Following input, you use a for loop, repeating from 1 to num-1; the loop begins at 1 because the comparison will start at index 1.

The while loop contains the condition if the temp is less than arr[j], which means that if temp, which is storing the index 1 element, is less than arr[j], which is the index 0 elements, you will move arr[j] to its proper location, i.e., arr[j+1].

Final Output

Insertion Sorting Output

By Quick Sort

The most popular sorting algorithm and most effective sorting algorithm are quicksorts. It utilizes the divide and sorting strategy, dividing the array into smaller subarrays. When these smaller subarrays have been sorted, they are combined to create a more extensive sorted array.

Quick Sort

In this example, you give the array to the Quick function along with its starting index of 0 and its last index of num-1 after receiving the array as input from the user.

A conditional statement inside the Quick function specifies that only the if block will run if the array has more than one element and the start index is less than the end index. The pivot element is given the final element inside this division function. 

Final Output

Quick Sort Output

By using all these methods, you can sort a string in C++.


After reading this article on sorting in C++, you better understand sorting and how to use sorting methods like bubble, insertion, quick, etc. 

You have also gained an understanding of the usefulness of the sorting methods through the use of examples.

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