Introduction to the example usage of pair method and vector method in C++
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The pair method.
Template struct pair
Parameters: T1 is the data type of the first value and T2 is the data type of the second value.
Function: pair combines a pair of values into a single value, which can have different data types (T1 and T2) and can be accessed by pair's two public functions, first and second.
Specific usage:
Access to two elements (via first and second):
pair p1; //Use default constructor p1.first = 1;p1.second = 2.5;cout
