Int sum _ idx _ Ji Shu (int *arr, unsigned I)
{
int sum = 0；
If (! arr)
return- 1；
for(； I>0; I-)
{
If (0! = (i - 1)%2)
sum+= arr[I- 1]；
}
Returns the sum;
}
int main()
{
int arr[ 10]= { 0 }； /* The value of a specific array can be changed at will */
Int result;
Result = sum(arr,10);
Printf ("Result: %d\n", result);
}