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