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add no. for zh exercises
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@@ -1,7 +1,7 @@
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# 引用和借用
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### 引用
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🌟
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1. 🌟
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```rust,editable
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fn main() {
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@@ -13,7 +13,7 @@ fn main() {
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}
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```
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🌟
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2. 🌟
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```rust,editable
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fn main() {
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@@ -25,7 +25,7 @@ fn main() {
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}
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```
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🌟
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3. 🌟
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```rust,editable
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// 修复错误
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@@ -38,7 +38,7 @@ fn main() {
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fn borrow_object(s: &String) {}
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```
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🌟
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4. 🌟
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```rust,editable
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// 修复错误
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@@ -53,7 +53,7 @@ fn push_str(s: &mut String) {
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}
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```
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🌟🌟
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5. 🌟🌟
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```rust,editable
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fn main() {
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@@ -69,7 +69,7 @@ fn main() {
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#### ref
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`ref` 与 `&` 类似,可以用来获取一个值的引用,但是它们的用法有所不同。
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🌟🌟🌟
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6. 🌟🌟🌟
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```rust,editable
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fn main() {
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@@ -92,7 +92,7 @@ fn get_addr(r: &char) -> String {
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```
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### 借用规则
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🌟
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7. 🌟
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```rust,editable
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// 移除代码某个部分,让它工作
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@@ -108,7 +108,7 @@ fn main() {
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```
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#### 可变性
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🌟 错误: 从可不用对象借用可用
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8. 🌟 错误: 从可不用对象借用可用
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```rust,editable
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fn main() {
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@@ -121,7 +121,7 @@ fn main() {
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fn borrow_object(s: &mut String) {}
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```
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🌟🌟 Ok: 从可变对象借用不可变
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9. 🌟🌟 Ok: 从可变对象借用不可变
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```rust,editable
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// 下面的代码没有任何错误
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@@ -137,7 +137,7 @@ fn borrow_object(s: &String) {}
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```
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### NLL
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🌟🌟
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10. 🌟🌟
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```rust,editable
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// 注释掉一行代码让它工作
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@@ -153,7 +153,7 @@ fn main() {
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}
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```
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🌟🌟
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11. 🌟🌟
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```rust,editable
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fn main() {
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