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  4. How to egalise two strings

How to egalise two strings

Scheduled Pinned Locked Moved C / C++ / MFC
helptutorial
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  • T toxcct

    s1 and s2 are std::strings...


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    Lost User
    wrote on last edited by
    #20

    Et cela pose problème? :doh:

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    • L Lost User

      If somebody is motivated to understand that, i have tried to regroup and order the programme. I hope you will help me. #include #include using namespace std; #include #include #include #include #include int main() { // Openning the flow : fstream list; list.open("listfile.txt",ios::in); // Decalaration of the variables: char t; int i; string s1; string s2; string s3; string s4; string s5; string s6; string s7; string s8; string s9; string s10; string s11; //Getting the name of the files: getline(list,s1);cout<tm_mday <<"-" << date->tm_mon + 1 <<"-" << date->tm_year + 1900 << ".txt"; //Declaration of the variables: int a1=0; int a2=0; int a3=0; int a11=0; int a4=0; int a5=0; int a6=0; int a7=0; int a8=0; int a9=0; int a10=0; char c; char t1; char t2; char t3; char t11; char t4; char t5; char t6; char t7; char t8; char t9; char t10; char f; // Opening clippr´ flow: fstream clippr; clippr.open("clippr.txt",ios::in); // Opening the files´ flow : fstream fichier1; fichier1.open(s1.c_str(),ios::in); fstream fichier2; fichier2.open(s2.c_str(),ios::in); fstream fichier3; fichier3.open(s3.c_str(),ios::in); fstream fichier11; fichier11.open(s11.c_str(),ios::in); fstream fichier4; fichier4.open(s4.c_str(),ios::in); fstream fichier5; fichier5.open(s5.c_str(),ios::in); fstream fichier6; fichier6.open(s6.c_str(),ios::in); fstream fichier7; fichier7.open(s7.c_str(),ios::in); fstream fichier8; fichier8.open(s8.c_str(),ios::in); fstream fichier9; fichier9.open(s9.c_str(),ios::in); fstream fichier10; fichier10.open(s10.c_str(),ios::in); // Getting the file lines: string c1;string c2; string c3; string f1;string f2; string f3; getline(clippr,c1); getline(clippr,c1);cout<

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      toxcct
      wrote on last edited by
      #21

      very bad thing to post a huge block of code and tell to anyone to see what's wrong with it... you must post relevant samples, and try to understand which are the incriminated lines. and use your debugger if you can


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      • S ShilpiP

        if(strcmp(s1,s2)==0)

        Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

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        Lost User
        wrote on last edited by
        #22

        Shilpi Boosar wrote:

        if(strcmp(s1,s2)==0)

        lead to the following error: <;146 C:\Documents and Settings\garfaoui\Ambiente de trabalho\test\clippr\main.cpp no matching function for call to `strcmp(std::string&, std::string&)' >

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        • L Lost User

          Et cela pose problème? :doh:

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          toxcct
          wrote on last edited by
          #23

          pourquoi tu le prend comme ca ? je le signalais juste à celui qui te répondait que son code ne marche que si ce sont des char*, pas des strings :~


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          • T toxcct

            pourquoi tu le prend comme ca ? je le signalais juste à celui qui te répondait que son code ne marche que si ce sont des char*, pas des strings :~


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            CPallini
            wrote on last edited by
            #24

            OK, ragazzi, ora, rilassatevi...:-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.

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            • T toxcct

              pourquoi tu le prend comme ca ? je le signalais juste à celui qui te répondait que son code ne marche que si ce sont des char*, pas des strings :~


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              Lost User
              wrote on last edited by
              #25

              Oula je ne suis pas du tout enervé, choqué, ou autre. Je bois les paroles de tous ceux qui postent un message sur ce forum car je n´ai a mon actif ke 30h de langage c++. Je n´y connais pas grand chose. :) Je suis actuellement en stage et je dois realiser ce programme. Cela fait maintenant une semaine que je suis dessus, et je sens qu´il est tout près d´aboutir. Désolé si ma réponse a pu paraitre sèche, ce n´etait pas du tout l´esprit du message. C´est l´effet message ecrit qui ne transcrit pas le ton de la voix. :)

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              • C CPallini

                OK, ragazzi, ora, rilassatevi...:-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.

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                toxcct
                wrote on last edited by
                #26

                uhh, sorry, i don't understand much italian ! lol


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                • L Lost User

                  Oula je ne suis pas du tout enervé, choqué, ou autre. Je bois les paroles de tous ceux qui postent un message sur ce forum car je n´ai a mon actif ke 30h de langage c++. Je n´y connais pas grand chose. :) Je suis actuellement en stage et je dois realiser ce programme. Cela fait maintenant une semaine que je suis dessus, et je sens qu´il est tout près d´aboutir. Désolé si ma réponse a pu paraitre sèche, ce n´etait pas du tout l´esprit du message. C´est l´effet message ecrit qui ne transcrit pas le ton de la voix. :)

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                  toxcct
                  wrote on last edited by
                  #27

                  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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                  • T 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
                    wrote on last edited by
                    #28

                    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:

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                    • T toxcct

                      uhh, sorry, i don't understand much italian ! lol


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                      CPallini
                      wrote on last edited by
                      #29

                      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.

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                      • L 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:

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                        toxcct
                        wrote on last edited by
                        #30

                        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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                        • T 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
                          wrote on last edited by
                          #31

                          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...:((

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                          • L 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...:((

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                            Lost User
                            wrote on last edited by
                            #32

                            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!!!

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                            • L 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...:((

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                              toxcct
                              wrote on last edited by
                              #33

                              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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                              • L Lost User

                                Hello, I would like to compare two strings: i used: if (s1==s2) { I have no problem to compile, but even when s1=s2 it doesnt work...

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                                ShilpiP
                                wrote on last edited by
                                #34

                                string s1 = "shilpi"; string s2 = "shilpi"; if(strcmp(s1.c_str(),s2.c_str())==0) { printf("Hi"); } what i wanna say is this ,try it

                                Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

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                                • L Lost User

                                  Oula je ne suis pas du tout enervé, choqué, ou autre. Je bois les paroles de tous ceux qui postent un message sur ce forum car je n´ai a mon actif ke 30h de langage c++. Je n´y connais pas grand chose. :) Je suis actuellement en stage et je dois realiser ce programme. Cela fait maintenant une semaine que je suis dessus, et je sens qu´il est tout près d´aboutir. Désolé si ma réponse a pu paraitre sèche, ce n´etait pas du tout l´esprit du message. C´est l´effet message ecrit qui ne transcrit pas le ton de la voix. :)

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                                  Rage
                                  wrote on last edited by
                                  #35

                                  Francais et en stage au Portugal ?

                                  Don't follow any man spiritually, don't do anything that will get you in sh*t if god is real - Bradml[^]

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                                  • R Rage

                                    Francais et en stage au Portugal ?

                                    Don't follow any man spiritually, don't do anything that will get you in sh*t if god is real - Bradml[^]

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                                    Lost User
                                    wrote on last edited by
                                    #36

                                    tout a fait =):-D

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                                    • L Lost User

                                      tout a fait =):-D

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                                      Rage
                                      wrote on last edited by
                                      #37

                                      Te laisse pas impressioner par Tox, il est dur, mais très très fort. ;P

                                      Don't follow any man spiritually, don't do anything that will get you in sh*t if god is real - Bradml[^]

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                                      • R Rage

                                        Te laisse pas impressioner par Tox, il est dur, mais très très fort. ;P

                                        Don't follow any man spiritually, don't do anything that will get you in sh*t if god is real - Bradml[^]

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                                        Lost User
                                        wrote on last edited by
                                        #38

                                        Ne t´inquète pas! En tout cas il m´a bien aidé! C´est par rapport au repertoire de l´executable que tu as vu que j´étais au Portugal?

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                                        • L Lost User

                                          Ne t´inquète pas! En tout cas il m´a bien aidé! C´est par rapport au repertoire de l´executable que tu as vu que j´étais au Portugal?

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                                          toxcct
                                          wrote on last edited by
                                          #39

                                          non, par rapport a ton profil ^^ @Régis, merci pr la petite note d'humour... "il est tres tres fort", c'est a double tranchant ca ;P


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