compare two String ?

[DaoK]

In java we have .equals()

but in C++ I can not find it ? I have tryed strcmp but it doesn't work.

Any suggestion?

[abdul]

strcmp should work. What code are you using?

if(strcmp(string1, string2) == 0)
{
cout<<"Both strings are same";
} 

[DaoK]

int CompareString(
LCID Locale, // locale identifier
DWORD dwCmpFlags, // comparison-style options
LPCTSTR lpString1, // pointer to first string
int cchCount1, // size, in bytes or characters, of first string
LPCTSTR lpString2, // pointer to second string
int cchCount2 // size, in bytes or characters, of second string
);


That thing doesnt work let me try your code

[DaoK]

Here is the error I got with your code :

error C2664: 'strcmp' : cannot convert parameter 1 from 'class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >' to 'const cha
r *'

[Wynd]

If you're using the C++ string class you can just do:

if (str1 == str2)
{
    cout << "Equal" << endl;
} 

[DaoK]

Wynd thx it's work now but I am wondering why the other solution didn't work ?

[Wynd]

Because all the functions in <cstring> are for use with the character array strings from C. So basically, there is no function that matches strcmp(string, string) so it spits out an error.

[abdul]

Because String is a class and strcmp only uses a "char" type. So it won't accept any parameter that's declared as String.
But the member function "c_str()" of String will return the string as a character array that you can use with strcmp.
You can also do like this but Wynd's solution is easier:

if(strcmp(string1.c_str(), string2.c_str()) == 0 )
{
cout<<"Both strings are same";
} 

[RuneLancer]

If I am not mistaken, the strcmp(); function's return value is extremenly useful. THis is slightly off-topic, but you can use the return value to know wether string1 is less than or greater than string2, alphabetically.

If you have char arrays, experiment with that a bit. I think if the return value is less than 0, string1 < string2, 0 means string1 == string2, and greater than 0 means string1 > string2.