Using - C
  
 Source Code
  

    
      #include<stdio.h>
      void main() {
        int num, x, sum=0, product=1;
        printf("Enter an Integer: ");
        scanf("%d",&num);
        
        while(num!=0) {
        x = num % 10;
        sum += x;
        product *= x;
        num /= 10;
        }
        
        printf("Sum of Digits: %d",sum);
        printf("\nProduct of Digits: %d",product);
      }
    

Enter an Integer: 356
Sum of Digits: 14
Product of Digits: 90

        
Using - C++
        
 Source Code
        

        
            #include<iostream>
            using namespace std;
            int main() {
              int num, x, sum=0, product=1;
              cout<<"Enter an Integer: ";
              cin>> num;

              while(num!=0) {
              x = num % 10;
              sum += x;
              product *= x;
              num /= 10;
            }

            cout<<"Sum of Digits: "<< sum<< endl;
            cout<<"Product of Digits: "<< product;
            return 0;
          }
      

Enter an Integer: 254
Sum of Digits: 11
Product of Digits: 40