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book: add line breaks for code formatting (#226)

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This commit is contained in:
Lucas Vilas-Bôas
2022-02-28 05:58:23 -03:00
committed by GitHub
parent 1db84fe462
commit afdc39431f
2 changed files with 27 additions and 17 deletions
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10
book/en-us/05-pointers.md
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@@ -58,20 +58,26 @@ auto pointer = std::make_shared<int>(10);
auto pointer2 = pointer; // reference count+1
auto pointer3 = pointer; // reference count+1
int *p = pointer.get(); // no increase of reference count
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 3
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 3
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 3
pointer2.reset();
std::cout << "reset pointer2:" << std::endl;
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 2
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 0, pointer2 has reset
std::cout << "pointer2.use_count() = "
<< pointer2.use_count() << std::endl; // 0, pointer2 has reset
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 2
pointer3.reset();
std::cout << "reset pointer3:" << std::endl;
std::cout << "pointer.use_count() = " << pointer.use_count() << std::endl; // 1
std::cout << "pointer2.use_count() = " << pointer2.use_count() << std::endl; // 0
std::cout << "pointer3.use_count() = " << pointer3.use_count() << std::endl; // 0, pointer3 has reset
std::cout << "pointer3.use_count() = "
<< pointer3.use_count() << std::endl; // 0, pointer3 has reset
```
## 5.3 `std::unique_ptr`