Built in function to compare strings in C++?

Question

I need some built-in function to compare strings. For C-style strings I have

strcmp();

But I need some function to deal with the string class.

string name1;
string name2;

-1. If "==" maybe hard to find, just search for title should have revealed at least something - http://www.bing.com/search?q=function+to+compare+string+in+c%2B%2B%3F gives plenty of `string::compare` links. — Alexei Levenkov, Apr 22 '13 at 06:40

score 10 · Answer 1 · answered Apr 22 '13 at 06:37

10

if (name1 == name2)

Other comparison operators are also available, namely !=, <, <=, > and >=.

answered Apr 22 '13 at 06:37

johnsyweb

1

you may add about std::string::compare too? – Koushik Shetty Apr 22 '13 at 06:42
2

I *could* add about [`std::basic_string::compare()`](http://en.cppreference.com/w/cpp/string/basic_string/compare), which is closer in syntax to the C function, but I choose not to since the operators make for much more readable code. – johnsyweb Apr 22 '13 at 06:45
@Koushik: Unfortunately, the OP does not agree! – johnsyweb Apr 22 '13 at 06:59

score 1 · Accepted Answer · answered Apr 22 '13 at 06:42

You could use std::string::compare() which provides the same functionality as strcmp().

std::string name1 = "John";
std::string name2 = "Micheal";

int result = name1.compare(name2);

Would roughly be the same as:

const char* name1 = "John";
const char* name2 = "Micheal";

int result = std::strcmp(name1, name2);

2 Answers2