C++ Exercises: Create a new string from a given string after swapping last two characters
C++ Basic Algorithm: Exercise-73 with Solution
Swap Last Two Characters
Write a C++ program to create a new string from a given string after swapping the last two characters.
Sample Solution:
C++ Code :
#include <iostream> // Including the input/output stream library
using namespace std; // Using the standard namespace
// Function that performs manipulation on the input string
string test(string s1)
{
// Check if the length of the string is greater than 1
if (s1.length() > 1)
{
// Return a modified string formed by rearranging characters:
// Substring from index 0 to length-2 (excluding last two characters)
// Last character of the original string
// Second-to-last character of the original string
return s1.substr(0, s1.length() - 2) + s1[s1.length() - 1] + s1[s1.length() - 2];
}
else
{
// Return the original string if its length is 1 or less
return s1;
}
}
// Main function
int main()
{
// Output the results of test function with different input strings
cout << test("Hello") << endl; // Output for "Hello"
cout << test("Python") << endl; // Output for "Python"
cout << test("PHP") << endl; // Output for "PHP"
cout << test("JS") << endl; // Output for "JS"
cout << test("C") << endl; // Output for "C"
return 0; // Return statement indicating successful termination of the program
}
Sample Output:
Helol Pythno PPH SJ C
Visual Presentation:
Flowchart:
C++ Code Editor:
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Previous: Write a C++ program to create a new string taking the first character from a given string and the last character from another given string. If the length of any given string is 0, use '#' as its missing character.
Next: Write a C++ program to check if a given string begins with 'abc' or 'xyz'. If the string begins with 'abc' or 'xyz' return 'abc' or 'xyz' otherwise return the empty string.
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