How to give values to arrays in c

Question

I am getting error in the following program. I am unable to figure out why I am not able to store values in the array

main()
{
    int A[10];
    A = {3,1,2,3,4,1,5,8,9,0};
    printArr(A,10);
    printf("\n");

    BubbleSort(A,10);

    printArr(A,10);
    printf("\n----------------Bubble Sort Efficiently ---------------------\n");
    printf("\n");

    A = {3,1,2,3,4,1,5,8,9,0};

    BubbleSortEfficient(A,10);
    printArr(A,10);

    return 0;
}

This is the error I got:

73: error: expected expression before ‘{’ token
80: error: expected expression before ‘{’ token

Please clarify with reason why I am not able to store array elements.

Answer 1

ANSI C does not have a syntax for defining array aggregates outside of array initializers. If you combine initialization with the assignment (which technically is not an assignment, but part of initialization) your code will compile:

int A[10] = {3,1,2,3,4,1,5,8,9,0};

Since you cannot reassign arrays, the portion of your program before the second call of BubbleSortEfficient should look like this:

int B[10] = {3,1,2,3,4,1,5,8,9,0};
BubbleSortEfficient(B, 10);
printArr(B, 10);

EDIT : (in response to comment by Keith Thompson) C99 introduces array aggregate expressions, but they cannot be assigned to arrays, because the standard does not have array assignments.