basic_string::_Copy_s

Copies at most a specified number of characters from an indexed position in a source string to a target character array.

size_type _Copy_s(
    value_type *_Dest,
    size_type _Dest_size,
    size_type _Count,
    size_type _Off = 0
) const;

Parameters

• _Dest
  The target character array to which the elements are to be copied.

• _Dest_size
  The size of _Dest.

• _Count
  The number of characters to be copied, at most, from the source string.

• _Off
  The beginning position in the source string from which copies are to be made.

Return Value

The number of characters actually copied.

Remarks

A null character is not appended to the end of the copy.

Example

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

int main( )
{
    using namespace std;
    string str1("Hello World");
    basic_string<char>::iterator str_Iter;
    const int array1_size = 20;
    char array1[array1_size] = { 0 };
    const int array2_size = 10;
    char array2[array2_size] = { 0 };
    basic_string<char>:: pointer array1Ptr = array1;
    basic_string<char>:: value_type *array2Ptr = array2;

    cout << "The original string str1 is: ";
    for (str_Iter = str1.begin(); str_Iter != str1.end(); str_Iter+)
        cout << *str_Iter;
    cout << endl;

    basic_string<char>::size_type nArray1;
    nArray1 = str1._Copy_s(array1Ptr, array1_size, 12);
    cout << "The number of copied characters in array1 is: "
         << nArray1 << endl;
    cout << "The copied characters array1 is: " << array1 << endl;

    basic_string<char>:: size_type nArray2;
    nArray2 = str1._Copy_s(array2Ptr, array2_size, 5, 6);
    cout << "The number of copied characters in array2 is: "
         << nArray2 << endl;
    cout << "The copied characters array2 is: " << array2Ptr << endl;
}

The original string str1 is: Hello World The number of copied characters in array1 is: 11 The copied characters array1 is: Hello World The number of copied characters in array2 is: 5 The copied characters array2 is: World

Requirements

Header: <string>

Namespace: std

See Also

Reference

basic_string Class

Safe Libraries: Standard C++ Library

Other Resources

basic_string Members