In this tutorial, we will discuss a concept of C++ program to compute the sum of digits in a given numbers
In C++ programming language, we can use for loop ,while loop and do-while loop to compute the sum of digits in a given numbers
In this article, we are going to learn how to find the sum of digits in a given number in C++ language
Program 1
#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
long num,counter,digits,sum=0;
cout<<"Enter a number of find sum of digits\n";
cin>>num;//get input from the user for find sum of digits
for(counter=num; num>0; num/=10)
{
digits=num%10;
sum=sum+digits;
}
cout<<"Given number is:" <<counter;
cout<<"\nSum of the digits is"<<counter <<"is :" << sum;
getch();
return 0;
}
When the above code is executed, it produces the following results
Case 1
Enter a number for find sum of digits 1010 Given number is:1010 Sum of the digits 1010 is = 2
Case 2
Enter a number for find digits sum 54321 Given number is:54321 Sum of the digits 54321 is = 15
Program 2
#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
long num,counter,digits,sum=0;
cout<<"Enter a number of find sum of digits\n";
cin>>num;//get input from the user for find sum of digits
counter=num;
while( num>0)
{
digits=num%10;
sum=sum+digits;
num/=10;
}
cout<<"Given number is:" <<counter;
cout<<"\nSum of the digits is"<<counter <<"is :" << sum;
getch();
return 0;
}
When the above code is executed, it produces the following results
Case 1
Enter a number for find sum of digits 1090 Given number is:1090 Sum of the digits 1090 is = 10
Case 2
Enter a number for find digits sum 123456 Given number is:123456 Sum of the digits 123456 is = 21
Program 3
#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
long num,counter,digits,sum=0;
cout<<"Enter a number of find sum of digits\n";
cin>>num;//get input from the user for find sum of digits
counter=num;
do{
digits=num%10;
sum=sum+digits;
num/=10;
}while( num>0);
cout<<"Given number is:" <<counter;
cout<<"\nSum of the digits is"<<counter <<"is :" << sum;
getch();
return 0;
}
When the above code is executed, it produces the following results
Case 1
Enter a number for find sum of digits 11001100 Given number is:11001100 Sum of the digits 11001100 is = 4
Case 2
Enter a number for find digits sum 876543 Given number is:876543 Sum of the digits 876543 is = 33
Methods
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