對結構內的指針指向的數組進行索引

Question

查看我的Previous question。我得到了這套代碼的解決方案

const MEMBERS *some_members = (MEMBERS *) GET_MEM(); 
unsigned value1 = some_members->mem1; 
unsigned value2 = *some_members->mem2; 

沒有工作正如我所料。但在情況下樣品是

unsigned sample [4] = {2,5,6,1}; 

如何去在陣列的索引，如果我需要做索引到所述陣列的所述第三字符（即樣品[3] = 1）。從結構。我是否也將價值2作爲指標？

感謝所有..

Answer 1

在這種情況下，是的，讓value2指針。即：

const MEMBERS *some_members = (MEMBERS *) GET_MEM(); 
unsigned value1 = some_members->mem1; 
unsigned *value2 = some_members->mem2; 

// These are true statements 
value2[0] == 2; 
value2[1] == 5; 
value2[2] == 6; 
value2[3] == 1; 

Answer 2

指針和數組可以訪問相同。

例如：

int array[4] = { 1, 2, 3, 4 }; 
printf("Third entry in array = %d\n", array[2]); 

int *pointer = array; 
printf("Third entry in array using pointer = %d\n", pointer[2]); 

如果指針處於結構或不不要緊，只要使用正常字段訪問（例如structure.pointer[2]或structpointer->pointer[2]）。