typedef pair<int,int> pii;
时间: 2023-06-19 20:05:40 浏览: 90
这是一个C++中的语法,它定义了一个名为pii的结构体,其中包含两个int类型的成员变量。这个结构体常用来表示坐标或者一些有序的数对。同时,使用typedef关键字可以将pair<int,int>定义为一个新的类型pii,从而方便在代码中的使用。比如,可以这样定义一个pii类型的变量p:pii p = make_pair(1, 2);。这样就可以用p.first和p.second来访问这个数对的两个元素了。
相关问题
typedef pair<int,int> PII
As an AI language model, I can say that the above code is a C++ code that defines a new datatype PII using typedef. Here, PII is a pair of two integers. The pair is defined using the pair template class in C++. The first integer represents the first element of the pair and the second integer represents the second element of the pair. The code is used to make the code more readable and easier to write, as the programmer can just use PII instead of writing "pair<int,int>" every time they want to use a pair of integers.
typedef pair<int, int> PII
As an AI language model, I can explain that the above code is a C++ syntax that defines a new data type "PII" using the "typedef" keyword.
"PII" is a pair of two integers that are represented as "int" data type in C++. The "pair" is a built-in container in C++ that stores two values of different data types together.
The syntax of the "pair" container in C++ is:
pair<type1, type2> pair_name;
Here, "type1" and "type2" are the data types of the two values that are stored in the container. The "pair_name" is the name of the container variable.
So, the above code defines a new data type "PII" that is a pair of two integers using the "typedef" keyword. This helps to simplify the code and make it more readable.