C++ Prime 學習

C++ 利用using語句：

其一：指定別名

點選檢視程式碼

int p[4][4] = { 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0};
for (int(*i)[4] = p; i != p + 4; i++) {
	for (int* j = *i; j != *i + 4; j++) {
		cout << *j << endl;
	}
}

利用using之後

點選檢視程式碼

<summary>點選檢視程式碼</summary>

using int_array = int[4];

int main() {
int p[4][4] = { 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0};
for (int_array(i) = p; i != p + 4; i++) {
for (int j = *i; j != *i + 4; j++) {
cout << *j << endl;
}
}
}

但是不能這樣
</details>

using int_array = int[4];

int main() {
int int_array[4] = {0,0,0,0};
}

實際上這個main函式里面定義的int_array是個變數名，所以只是一個新變數,using換做別名僅僅作為型別替換有效