массив

#include <iostream>
 
int main()
{
    int arr[] = { 1, 2, 0, 4, 5, 6, 0, 7, 8, 9, 10, 0, 3, 2, 11, 0, 8, 2, 0, 5, 6, 4 };
    int n = sizeof(arr)/sizeof(arr[0]);
 
    std::cout << "=======ARRAY=======" << std::endl;
    for (int i = 0; i < n; i++)
        std::cout << arr[i] << "  ";
 
    std::cout << std::endl;
 
    int firstZero, lastZero;
 
    for (int i = 0; i < n; i++)
        if ( arr[i] == 0 )
        {
            firstZero = i;
            break;
        }
 
    for (int i = n-1; i > 0; i--)
        if ( arr[i] == 0 )
        {
            lastZero = i;
            break;
        }
 
    int Sum = 0;
    for (int i = firstZero; i < lastZero; i++)
        Sum += arr[i];
 
    std::cout << "Position of the first zero element: " << firstZero << std::endl;
    std::cout << "Position of the last zero element: " << lastZero << std::endl;
    std::cout << "Sum: " << Sum << std::endl;
 
    return 0;
}

#include <iostream>
 
int main()
{
    int arr[] = { 1, 2, 0, 4, 5, 6, 0, 7, 8, 9, 10, 0, 3, 2, 11, 0, 8, 2, 0, 5, 6, 4 };
    int sum = 0, tmpsum;
    bool b = false;
    const int n = sizeof(arr) / sizeof(*arr);
    for (int i=0; i < n; i++)
    {
        if(b) tmpsum += arr[i];
        if (arr[i] == 0)
        {
            if(!b) b = true;
            else {sum += tmpsum; tmpsum = 0; }
        }
        std::cout<< arr[i]<< " ";
    }
    std::cout<< "\nSum: "<< sum;
    return 0;
}

int arr[] = {}; size = sizeof(arr) / sizeof(int);
char arr[] = {}; size = sizeof(arr) / sizeof(char);

char arr[20];
unsigned int size = sizeof(arr) / sizeof(*arr);

template< typename T >
T sum( T *array, const int size ) {
   int firstZero = 0,
       lastZero = size - 1,
       sum = 0;
 
   while ( array[ firstZero ] != 0 && firstZero < size )
      firstZero++;
   
   while ( array[ lastZero ] != 0 && lastZero > 0 )
      lastZero--;
 
   for ( int i = firstZero + 1; i < lastZero; i++ )
      sum += array[ i ];
 
   return sum;
}