basic_string::substr
Copies a substring of at most some number of characters from a string beginning from a specified position.
basic_string<CharType, Traits, Allocator> substr(
size_type _Off = 0,
size_type _Count = npos
) const;
Parameters
_Off
An index locating the element at the position from which the copy of the string is made, with a default value of 0._Count
The number of characters that are to be copied if they are present.
Return Value
A substring object that is a copy of elements of the string operand beginning at the position specified by the first argument.
Example
// basic_string_substr.cpp
// compile with: /EHsc
#include <string>
#include <iostream>
int main( )
{
using namespace std;
string str1 ("Heterological paradoxes are persistent.");
cout << "The original string str1 is: \n " << str1
<< endl << endl;
basic_string <char> str2 = str1.substr ( 6 , 7 );
cout << "The substring str1 copied is: " << str2
<< endl << endl;
basic_string <char> str3 = str1.substr ( );
cout << "The default substring str3 is: \n " << str3
<< "\n which is the entire original string." << endl;
}
The original string str1 is: Heterological paradoxes are persistent. The substring str1 copied is: logical The default substring str3 is: Heterological paradoxes are persistent. which is the entire original string.
Requirements
Header: <string>
Namespace: std