I want to slice array of character in c++ or simply equivivalent code of python code given below.
s1 = ["A", "B", "C" , "D" , "E"]
s2 = s1[0:2]
s2 ==> ["A","B"]
s1 ===> ["A", "B", "C" , "D" , "E"]
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2What's your question?Freddie– Freddie2013-09-27 22:08:16 +00:00Commented Sep 27, 2013 at 22:08
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I got my answer, i wanted to perform above task in c++Nakib– Nakib2013-09-27 22:25:22 +00:00Commented Sep 27, 2013 at 22:25
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2 Answers
You should use std::string objects while working with strings and for retrieving some part of the string you can use std::string::substr:
std::string s1("ABCDE");
std::string s2 = s1.substr(0, 2);
2 Comments
Mark Nunberg
Slices don't refer to the same array, rather they refer to the same array contents.
Veedrac
@aaronman Wrong, in Python a slice is a new object (although Python
strs, being immutable, use the same memory behind the scenes).std::string_View is the answer if you are using a C++17 compiler. See Get part of a char array
auto s1 = "ABCDE";
auto s2 = std::string_view{s1, 2}; // AB
If you don't want to start at position 0, you can move the pointer further along and slice from there:
auto s2 = std::string_view{s1 + 2, 2}; // CD
Unfortunately, there is currently no option for changing the step value, as with python
