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C++11 explicit关键字

 2 years ago
source link: https://forrestsu.github.io/posts/cpp/cpp-explicit-keywords/
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C++11 explicit关键字

2017年4月7日
| 字数 293
| CPP

C++中的explicit

class Test1
{
public:
    Test1(int n)
    {
        num=n;
    }//普通构造函数
private:
    int num;
};
class Test2
{
public:
    explicit Test2(int n)
    {
        num=n;
    }//explicit(显式)构造函数
private:
    int num;
};
int main()
{
    Test1 t1=12; //隐式调用其构造函数,成功
    Test2 t2=12; //编译错误,不能隐式调用其构造函数
    Test2 t2(12); //显式调用成功
    return 0;
}

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