w3resource

C++ Exercises: Find Harshad Number between 1 to 100

C++ Numbers: Exercise-21 with Solution

Write a program in C++ to find Harshad Number between 1 to 100.

Sample Solution:

C++ Code :

#include<bits/stdc++.h>
using namespace std;
bool chkHarshad(int n)
{
    int s = 0;
	int tmp;
    for (tmp=n; tmp>0; tmp /= 10)
        s += tmp % 10;
    return (n%s == 0);
}
int main()
{
    int i;
 cout << "\n\n Find Harshad Numbers between 1 to 100: \n";
 cout << " ---------------------------------------------------\n";
 cout << " The Harshad Numbers are: "<<endl;
for(i=1;i<=100;i++)
{
     if( chkHarshad(i))
        cout << i<<" ";
}
        cout << endl;

}

Sample Output:

 Find Harshad Numbers between 1 to 100:                                                              
 ---------------------------------------------------                                                 
 The Harshad Numbers are:                                                                            
1 2 3 4 5 6 7 8 9 10 12 18 20 21 24 27 30 36 40 42 45 48 50 54 60 63 70 72 80 81 84 90 100

Flowchart:

Flowchart: Find Harshad Number between 1 to 100
Flowchart: Find Harshad Number between 1 to 100

C++ Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a program in C++ to check if a number is Harshad Number or not.
Next: Write a program in C++ to check whether a number is a Pronic Number or Heteromecic Number or not.

What is the difficulty level of this exercise?



Share this Tutorial / Exercise on : Facebook and Twitter

C++ Programming: Tips of the Day

How to use the PI constant in C++?

On some (especially older) platforms (see the comments below) you might need to

#define _USE_MATH_DEFINES and then include the necessary header file:
#include<math.h>

and the value of pi can be accessed via:

M_PI

In math.h (2014) it is defined as:

# define M_PI           3.14159265358979323846  /* pi */

but check your math.h for more. An extract from the "old" math.h (in 2009):

/* Define _USE_MATH_DEFINES before including math.h to expose these macro
 * definitions for common math constants.  These are placed under an #ifdef 
 * since these commonly-defined names are not part of the C/C++ standards.
 */

However:

  1. on newer platforms (at least on my 64 bit Ubuntu 14.04) I do not need to define the _USE_MATH_DEFINES
  2. On (recent) Linux platforms there are long double values too provided as a GNU Extension:
# define M_PIl          3.14159265358979323846

Ref: https://bit.ly/3G4BgzQ