C++ String Exercises: Insert white spaces between lower and uppercase Letters

Last update on December 20 2024 12:32:23 (UTC/GMT +8 hours)

Write a C++ program to insert a space when a lower character follows an upper character in a given string.

Sample Data:
(“TheQuickBrownFox”) -> "The Quick Brown Fox."
(“redgreenwhite”) -> "redgreenwhite"

Sample Solution-1:

C++ Code:

#include <bits/stdc++.h> // Includes all standard libraries

using namespace std; // Using the standard namespace

// Function to insert white spaces between lower and uppercase letters in the input string
string test(string text) {
    string new_str = ""; // Initialize an empty string to store the modified string

    // Iterate through the characters in the string (except the last character)
    for(int i = 0; i < (text.length() - 1); i++) {
        new_str += text[i]; // Append the current character to the new string

        // Check if the next character is uppercase
        if(isupper(text[i + 1])) {
            new_str += " "; // If the next character is uppercase, insert a space in the new string
        }
    }
    new_str += text.back(); // Append the last character of the input string to the new string
    return new_str; // Return the modified string
}

int main() {
   string text = "TheQuickBrownFox."; // Define an input string
   //string text = "C++String exercises";
   //string text = "redgreenwhite";
   cout << "Original String:\n";
   cout << text; // Output the original string
   cout << "\n\nInsert white spaces between lower and uppercase Letters in the said string:\n";
   cout << test(text) << endl; // Output the modified string with spaces inserted
}

Sample Output:

Original String:
TheQuickBrownFox.

Insert white spaces between lower and uppercase Letters in the said string:
The Quick Brown Fox.

Flowchart:

Sample Solution-2:

C++ Code:

#include <bits/stdc++.h> // Includes all standard libraries

using namespace std; // Using the standard namespace

// Function to insert white spaces between lowercase and uppercase letters in the input string
string test(string text) {
    int n = 0; // Initialize a counter variable

    // Loop through the string to find lowercase followed by uppercase letters
    while (n + 1 < text.length()) {
        // Check if the current character is lowercase and the next character is uppercase
        if (islower(text[n]) && isupper(text[n + 1])) {
            // Insert a space between the lowercase and uppercase letters in the string
            text = text.substr(0, n + 1) + " " + text.substr(n + 1);
            n++; // Increment the counter to skip the inserted space
        }
        n++; // Move to the next character in the string
    }
    return text; // Return the modified string
}

int main() {
   string text = "TheQuickBrownFox."; // Define an input string
   //string text = "C++String exercises";
   //string text = "redgreenwhite";
   cout << "Original String:\n";
   cout << text; // Output the original string
   cout << "\n\nInsert white spaces between lower and uppercase Letters in the said string:\n";
   cout << test(text) << endl; // Output the modified string with spaces inserted
}

Sample Output:

Original String:
TheQuickBrownFox.

Insert white spaces between lower and uppercase Letters in the said string:
The Quick Brown Fox.

Flowchart:

C++ Code Editor:

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