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C++ Exercises: Reverse a string

C++ For Loop: Exercise-85 with Solution

Write a program in C++ to reverse a string.

Pictorial Presentation:

C++ Exercises: Reverse a string

Sample Solution:-

C++ Code :

#include <iostream>
using namespace std;

void revOfString(const string& a);

int main()
{
    string str;
    cout << "\n\n Reverse a string:\n";
	cout << "----------------------\n";
	cout << " Enter a string: ";
    getline(cin, str);
    cout << " The string in reverse are: ";    
    revOfString(str);
    return 0;    
}

void revOfString(const string& str)
{
    size_t lengthOfString = str.size();

    if(lengthOfString == 1)
       cout << str << endl;
    else
    {
       cout << str[lengthOfString - 1];
       revOfString(str.substr(0, lengthOfString - 1));
    }
}

Sample Output:

 Reverse a string:                                                     
----------------------                                                 
 Enter a string: w3resource                                            
 The string in reverse are: ecruoser3w  

Flowchart:

Flowchart: Reverse a string

C++ Code Editor:

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Next: Write a program in C++ to count the letters, spaces, numbers and other characters of an input string.

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C++ Programming: Tips of the Day

Which is faster: Stack allocation or Heap allocation

Stack allocation is much faster since all it really does is move the stack pointer. Using memory pools, you can get comparable performance out of heap allocation, but that comes with a slight added complexity and its own headaches.

Also, stack vs. heap is not only a performance consideration; it also tells you a lot about the expected lifetime of objects.

Ref : https://bit.ly/3COrdfj