C++ Exercises: Count the number of strings with a given length in an array

Last update on August 13 2025 12:45:54 (UTC/GMT +8 hours)

Count Strings of Given Length in String Array

Write a C++ program to count the number of strings with a given length in a given array of strings.

Test Data:
({"a", "b", "bb", "c", "ccc" }, 1) ->3
({"a", "b", "bb", "c", "ccc" }, 2) ->1
({"a", "b", "bb", "c", "ccc" }, 3) ->1

Sample Solution:

C++ Code :

#include <iostream>  // Including input-output stream header file
#include <string.h>  // Including string manipulation header file

using namespace std;  // Using standard namespace

// Function to count strings of a particular length in an array of strings
int test(string arr_str[], int len, int arr_length) {
    int ctr = 0;  // Counter variable to store the count of strings with the specified length

    // Loop through the array of strings
    for (int i = 0; i < arr_length; i++) {
        if (arr_str[i].size() == len)  // Check if the length of the string matches the specified length
            ctr++;  // Increment the counter if the length matches
    }
    return ctr;  // Return the count of strings with the specified length
}

// Main function
int main() {
    // Array of strings
    string text[] = {
        "a",
        "b",
        "bb",
        "c",
        "ccc"
    };

    // Displaying original array strings
    cout << "Original array strings: ";
    int arr_length = sizeof(text) / sizeof(text[0]);
    for (size_t i = 0; i < arr_length; i++) {
        std::cout << text[i] << ' ';
    }

    // Finding and displaying the count of strings with different lengths
    int len = 1;
    cout << "\n\nNumber of strings with length " << len << " = " << test(text, len, arr_length) << endl;
    len = 2;
    cout << "\nNumber of strings with length " << len << " = " << test(text, len, arr_length) << endl;
    len = 3;
    cout << "\nNumber of strings with length " << len << " = " << test(text, len, arr_length) << endl;

    return 0;  // Returning 0 to indicate successful completion of the program
}

Sample Output:

Original array strings: a b bb c ccc 

Number of strings with length 1 = 3

Number of strings with length 2 = 1

Number of strings with length 3 = 1

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to count the number of strings of a specified length within an array of strings and output the count.
Write a C++ program that reads an array of strings and a target length, then prints how many strings have that exact length.
Write a C++ program to iterate over a string array and count the elements whose length matches a given number.
Write a C++ program that accepts an array of strings and a length value, then returns the total number of strings with that length.

Go to:

PREV : Find Larger Average Between First and Second Halves of Array.
NEXT : Create Array of First n Strings from Array.

C++ Code Editor:

Contribute your code and comments through Disqus.