C++ Program to Find Sum of Digits of a Number – C++ Program

C++ Program to Find the Sum of Digits of a Number – C++ Program.

Flowchart of Sum of Digits of a Number – C++

Flowchart of Program to Find Sum of Digits of a Number - C++ Program

C++ Source Code of Program

#include<iostream>
using namespace std;
int main()
{
	int num,i,k=9;
	int sum=0;
	cout<<"Please Enter a number:";
	cin>>num;
	i=1;
	do
	{
		sum=sum+k;
		k=k*10+9;
		i++;
	}
while(i<=num);
cout<<"The sum of series="<<sum;
}

#include<iostream>

using namespace std;

int main()

{

int num,i,k=9;

int sum=0;

cout<<"Please Enter a number:";

cin>>num;

i=1;

{

sum=sum+k;

k=k*10+9;

i++;

}

while(i<=num);

cout<<"The sum of series="<<sum;

}

Output Please Enter a number: 5 The sum of series = 111105

Exercise

Find the possible mistakes in the following Shamil’s Flow Table of the Program to Find the Sum of Digits of a Number – C++ Program.

Loop	condition	What lines will execute	Actual work to do
i=1		1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16	sum=sum +k; 9=0+9 K=k10+9; 99=910+9
1 time i=2	True	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 10,11,12,13,14,15,16	sum=sum +k; 108=9+99 K=k10+9; 999=9910+9
2 times i=3	True	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 10,11,12,13,14,15,16,10,11,12,13,14,15,16	sum=sum +k; 1107=108+999 K=k10+9; 9999=99910+9
3 time i=4	False	1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, 10,11,12,13,14,15,16,10,11,12,13,14,15,16,17,18	“sum of series”

C++ Program to Find Sum of Digits of a Number – C++ Program
By: Prof. Dr. Fazal Rehman | Last updated: October 21, 2023

Flowchart of Sum of Digits of a Number – C++

C++ Source Code of Program

Exercise

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