How to egalise two strings

toxcct

ok, let's continue in english now. you still didn't answered a question of mine... what, for you, is the difference between equalize and compare 2 strings ?

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Lost User

to me, compare is looking at 2 objects and see if they are equal or not. egalise a and b is a=b (change the value of a or b so that it is equal to the other value) is it clear :doh:

CPallini

Oh, pardon, I assumed it was a multi-ethnic thread... :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.

toxcct

ok, i get what's your problem then... you are trying to speak english with french words ;P don't say equalize but assign. anyway, as you're using std::strings, just use the = operator for this, and == operator to compare their content.

std::string s1 = "Hello";
std::string s2 = "World";

ASSERT(s1 != s2); // the objects contain different strings

s1 = s2; //Assign s2 content into s1
ASSERT(s1 == s2); // the objects contain same strings

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Lost User

OK, just to see if i have caught what you said: I should use == to compare if string s1 has the same content with string s2. That´s it? Because I already have tried that and it doesn´t work...:((

Lost User

Hum ... i did a mistake while typing the code, i always typed: if(s1==s2) but the thing i wanted to check is if (s1!=s2) I am so sorry for the loss of time.... :| Anyway, thank you very much for your help!!!

toxcct

garfaoui wrote:

I should use == to compare if string s1 has the same content with string s2. That´s it?

exactly. but be careful, the operator must be the overload of std::string class. in the expression s1 == s2, if s1 is of type std::string, the code actually means to the compiler s1.operator==(s2) (calling then the function bool std::string::operator==(const std::string&)). but if s1 is a basic C-Style string (a char* basically), the compiler will try to compare the addresses, not the string contents... the context is exactly the same while using the operator != . so, can you please post a relevant (but small) piece of code which can reproduce the error ? also, specify to us the type of all the variables used, and which error you get (if it is a compiler error, linker error, or run-time error), and its message.

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