C++ Exercises: Input any number and print it in words

C++ For Loop: Exercise-60 with Solution

Write a program in C++ to input any number and print it in words.

Pictorial Presentation:

C++ Exercises: Input any number and print it in words

Sample Solution:-

C++ Code :

#include <iostream>
using namespace std;
int main()
    int n, num = 0, i;
    cout << "\n\n Print a number in words:\n";
    cout << "-----------------------------\n";
    cout << " Input any number: ";
    cin >> n;
    while (n != 0) {
        num = (num * 10) + (n % 10);
        n /= 10;
    for (i = num; i > 0; i = i / 10) {

        switch (i % 10) {
        case 0:
            cout << "Zero ";
        case 1:
            cout << "One ";
        case 2:
            cout << "Two ";
        case 3:
            cout << "Three ";
        case 4:
            cout << "Four ";
        case 5:
            cout << "Five ";
        case 6:
            cout << "Six ";
        case 7:
            cout << "Seven ";
        case 8:
            cout << "Eight ";
        case 9:
            cout << "Nine ";
    cout << endl;

Sample Output:

 Print a number in words:                                              
 Input any number: 8309                                                
Eight Three Zero Nine


Flowchart: Input any number and print it in words

C++ Code Editor:

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Next: Write a program in C++ to print all ASCII character with their values.

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C++ Programming: Tips of the Day

What is a smart pointer and when should I use one?

This answer is rather old, and so describes what was 'good' at the time, which was smart pointers provided by the Boost library. Since C++11, the standard library has provided sufficient smart pointers types, and so you should favour the use of std::unique_ptr, std::shared_ptr and std::weak_ptr.

There was also std::auto_ptr. It was very much like a scoped pointer, except that it also had the "special" dangerous ability to be copied - which also unexpectedly transfers ownership.

It was deprecated in C++11 and removed in C++17, so you shouldn't use it.

std::auto_ptr<MyObject> p1 (new MyObject());
std::auto_ptr<MyObject> p2 = p1; // Copy and transfer ownership. 
                                 // p1 gets set to empty!
p2->DoSomething(); // Works.
p1->DoSomething(); // Oh oh. Hopefully raises some NULL pointer exception.

Ref : https://bit.ly/3mc9GHE