Question

Write a recursive function that accumulates the sum of values in an n element array and prints out the contents of the array and the final sum and average.

In c language

Answer 1

#include <stdio.h>

int sumArray(int arr[], int start, int size){
   if(start < size){
      return arr[start] + sumArray(arr, start + 1, size);
   }
   else{
      return 0;
   }
}

int main() {
       int arr[] = {12, 5, 7, 3, 8, 9, 4};
       int size = 7, i, s;
       
       for(i = 0;i<size;i++){
          printf("%d ",arr[i]);
   }
   printf("\n");
   
   s = sumArray(arr, 0, size);
       printf("Sum of the array: %d\nAverge = %f\n",s,(1.0*s/size));;
       
       return 0;
}