哪位可否介绍一下difference_type和 mismatch??

[cd7809]

最好举个小例子，非常感谢!

[fangrk]

int A1[] = { 3, 1, 4, 1, 5, 9, 3 };
int A2[] = { 3, 1, 4, 2, 8, 5, 7 };
const int N = sizeof(A1) / sizeof(int);

pair<int*, int*> result = mismatch(A1, A1 + N, A2);
cout << "The first mismatch is in position " << result.first - A1 << endl;
cout << "Values are: " << *(result.first) << ", " << *(result.second) << endl;

[fangrk]

Member Where defined Description
difference_type Container A signed integral type.


Distance type
X::difference_type
A signed integral type used to represent the distance between two of the container's iterators. This type must be the same as the iterator's distance type.