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Generally, to find a value in unsorted array, we should look through elements of an array one by one, until searched value is found. In case of searched value is absent from array, we go through all elements. In average, complexity of such an algorithm is proportional to the length of the array. Situation changes significantly, when array is sorted. If we know it, random access capability can be utilized very efficiently to find searched value quick. Cost of searching algorithm reduces to binary logarithm of the array length.
BINARY SEARCH ALGORITHM (Java, C++) | Algorithms and Data Structures
public member function int compare ( const string& str ) const; int compare ( const char* s ) const; int compare ( size_t pos1, size_t n1, const string& str ) const; int compare ( size_t pos1, size_t n1, const char* s) const; int compare ( size_t pos1, size_t n1, const string& str, size_t pos2, size_t n2 ) const; int compare ( size_t pos1, size_t n1, const char* s, size_t n2) const; Compare strings
string::compare - C++ Reference
Divide in half A fast way to search a sorted array is to use a binary search . The idea is to look at the element in the middle.
C++ Notes: Algorithms: Binary Search
When I also started working with multi-dimensional arrays I found it hard to find the answers I wanted too. So I'll post up some info that will hopefully help other people. I'll go over both of the 2 major methods (Vector vs Pointer). They provide an added benefit that they will automatically remove the memory they use when they go out of scope.
Multi-Dimensional Arrays - C++ Forum
what do you want to know about it? c++ objects are normally passed by reference to avoid expensive duplication and to let other functions use the same object as the calling function.
