book: use curly brackets to initailize aggregate objects (changkun#112)

TinyWang · changkun · commit 4de9eb49f7da · 2020-08-10T10:00:08.000+02:00
diff --git a/book/en-us/02-usability.md b/book/en-us/02-usability.md
@@ -426,10 +426,10 @@ auto arr = new auto(10); // arr as int *
 > In addition, `auto` cannot be used to derive array types:
 > 
 > ```cpp
-> auto auto_arr2[10] = arr;   // illegal, can't infer array type
+> auto auto_arr2[10] = {arr};   // illegal, can't infer array type
 >
 > 2.6.auto.cpp:30:19: error: 'auto_arr2' declared as array of 'auto'
->     auto auto_arr2[10] = arr;
+>     auto auto_arr2[10] = {arr};
 > ```
 
 ### decltype
diff --git a/book/zh-cn/02-usability.md b/book/zh-cn/02-usability.md
@@ -361,10 +361,10 @@ auto arr = new auto(10); // arr 被推导为 int *
 > 此外，`auto` 还不能用于推导数组类型：
 >
 > ```cpp
-> auto auto_arr2[10] = arr;   // 错误,  无法推导数组元素类型
+> auto auto_arr2[10] = {arr};   // 错误,  无法推导数组元素类型
 >
 > 2.6.auto.cpp:30:19: error: 'auto_arr2' declared as array of 'auto'
->     auto auto_arr2[10] = arr;
+>     auto auto_arr2[10] = {arr};
 > ```
 
 ### decltype
diff --git a/code/2/2.06.auto.cpp b/code/2/2.06.auto.cpp
@@ -37,7 +37,7 @@ int main() {
     auto i = 5;                 // type int
     auto j = 6;                 // type int
     auto arr = new auto(10);    // type int*
-    // auto auto_arr2[10] = arr;
+    // auto auto_arr2[10] = {arr};
     // std::cout << add(i, j) << std::endl;
     return 0;
 }

Original file line number	Diff line number	Diff line change
`@@ -426,10 +426,10 @@ auto arr = new auto(10); // arr as int *`
`426`	`426`	> In addition, `auto` cannot be used to derive array types:
`427`	`427`	`>`
`428`	`428`	> ```cpp
`429`		`-> auto auto_arr2[10] = arr; // illegal, can't infer array type`
	`429`	`+> auto auto_arr2[10] = {arr}; // illegal, can't infer array type`
`430`	`430`	`>`
`431`	`431`	`> 2.6.auto.cpp:30:19: error: 'auto_arr2' declared as array of 'auto'`
`432`		`-> auto auto_arr2[10] = arr;`
	`432`	`+> auto auto_arr2[10] = {arr};`
`433`	`433`	> ```
`434`	`434`
`435`	`435`	`### decltype`
Original file line number	Diff line number	Diff line change
`@@ -361,10 +361,10 @@ auto arr = new auto(10); // arr 被推导为 int *`
`361`	`361`	> 此外，`auto` 还不能用于推导数组类型：
`362`	`362`	`>`
`363`	`363`	> ```cpp
`364`		`-> auto auto_arr2[10] = arr; // 错误, 无法推导数组元素类型`
	`364`	`+> auto auto_arr2[10] = {arr}; // 错误, 无法推导数组元素类型`
`365`	`365`	`>`
`366`	`366`	`> 2.6.auto.cpp:30:19: error: 'auto_arr2' declared as array of 'auto'`
`367`		`-> auto auto_arr2[10] = arr;`
	`367`	`+> auto auto_arr2[10] = {arr};`
`368`	`368`	> ```
`369`	`369`
`370`	`370`	`### decltype`