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char_traits::_Move_s 

Copies a specified number of characters in a sequence to another, possibly overlapping sequence.


static char_type *_Move_s(
    char_type *_Dest,
    size_t _Dest_size,
    const char_type *_From,
    size_t _Count
);

Parameters

_Dest

The element at the beginning of the string or character array targeted to receive the copied sequence of characters.

_Dest_size

The size of _Dest. If char_type is char, then this is in bytes. If char_type is wchar_t, then this is in words.

_From

The element at the beginning of the source string or character array to be copied.

_Count

The number of elements to be copied from the source string.

The first element _Dest copied into the string or character array targeted to receive the copied sequence of characters.

The source and destination may overlap.

// char_traits__Move_s.cpp
// compile with: /EHsc
#include <string>
#include <iostream>

int main( )
{
    using namespace std;

    char_traits<char>::char_type sFrom1[] =  "abcd-1234-abcd";
    char_traits<char>::char_type sTo1[] =  "ABCD-1234";
    char_traits<char>::char_type* result1;
    cout << "The source string sFrom1 is: " << sFrom1 << endl;
    cout << "The destination stringsTo1 is: " << sTo1 << endl;
    result1 = char_traits<char>::_Move_s(sTo1,
        char_traits<char>::length(sTo1), sFrom1, 4);
    cout << "The result1 = _Move_s(sTo1, "
         << "char_traits<char>::length(sTo1), sFrom1, 4) is: "
         << result1 << endl << endl;

    // When source and destination overlap
    char_traits<char>::char_type sToFrom2[] = "abcd-1234-ABCD";
    char_traits<char>::char_type* result2;
    cout << "The source/destination string sToFrom2 is: "
         << sToFrom2 << endl;
    const char* findc = char_traits<char>::find(sToFrom2, 4, 'c');
    result2 = char_traits<char>::_Move_s(sToFrom2,
        char_traits<char>::length(sToFrom2), findc, 8);
    cout << "The result2 = _Move_s(sToFrom2, "
        << "char_traits<char>::length(sToFrom2), findc, 8) is: "
         << result2 << endl;
}

Output

The source string sFrom1 is: abcd-1234-abcd
The destination stringsTo1 is: ABCD-1234
The result1 = _Move_s(sTo1, char_traits<char>::length(sTo1), sFrom1, 4) is: abcd-1234

The source/destination string sToFrom2 is: abcd-1234-ABCD
The result2 = _Move_s(sToFrom2, char_traits<char>::length(sToFrom2), findc, 8) is: cd-1234-4-ABCD

Header: <string>

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