C語言中結構體的初始化例子：
struct point
{
int x;
int y;
int z;
}
//常規寫法
struct point pt1 = {100, 300, 200};
//初始化個數少於實際個數時，只初始化前面的成員
struct point pt2 = {400};
struct point pt3 = (struct point){100, 200, 300};
//網上說這叫亂序初始化,C99加的。
struct point pt4 = {
.y = 100,
.x = 400,
.z = 0
};
//因為是初始化，如果向下面這樣賦值就錯了：
//struct point pt4;
//pt4 = {100,200,300};
//pt4 = {.z = 100};
