Just learning functions and keep getting lost in the variables. So i took a step back and just tried to do a very basic adding function and its still not working. Where am i going wrong?

Code:#include <stdio.h> #define SIZE 50 int sum_array(int a[], int b); int main( void ) { int n,i; int numbers[n]; printf( "How many numbers would you like to add?: " ); scanf( "%d", &n ); for ( i = 0; i < n; i++ ) { printf( "Enter number %d: ", i + 1 ); scanf( "%d", &numbers[i] ); } printf( "The total of all the numbers is %d\n",sum_array(numbers,n)); return 0; } int sum_array(int a[], int b) { int i, sum =0; for ( i = 0; i < b; i++ ) { sum += a[i];} return sum; }