book@100ask:~/C_coding/CH02$ cat arr.c
#include <stdio.h>

int main()
{
	int i;
	int a[] = {1,3,5,7,9};

	for(i = 0; i < sizeof(a)/sizeof(*a);i++)
		printf("%d ",a[i]);
	printf("\n");
}
book@100ask:~/C_coding/CH02$ make arr
cc     arr.c   -o arr
book@100ask:~/C_coding/CH02$ ./arr
1 3 5 7 9