- typedef int data_t;
- typedef struct {
- long int len;
- data_t* data;
- }vec_rec, *vec_ptr;
- #define IDENT 0
- #define OP +
- //#define IDENT 1
- //#define OP *
- vec_ptr new_vec(long int len)
- {
- vec_ptr result = (vec_ptr)malloc(sizeof(vec_rec));
- if (NULL == result)
- {
- return NULL;
- }
- result->len = len;
- if (len > 0)
- {
- data_t* data = (data_t*)calloc(len, sizeof(data_t));
- if (NULL == data)
- {
- free((void*)result);
- return NULL;
- }
- result->data = data;
- }
- else
- {
- result->data = NULL;
- }
- return result;
- }
- int get_vec_element(vec_ptr v, long int index, data_t* dest)
- {
- if (index < 0 || index >= v->len)
- {
- return 0;
- }
- *dest = v->data[index];
- return 1;
- }
- long int vec_length(vec_ptr v)
- {
- return v->len;
- }
- void combine1(vec_ptr v, data_t* dest)
- {
- long int i;
- *dest = IDENT;
- for (i = 0; i < vec_length(v); ++i)
- {
- data_t val;
- get_vec_element(v, i, &val);
- *dest = *dest OP val;
- }
- }
ProgramExample
最新推荐文章于 2019-12-10 20:13:39 发布
