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  4. Copy the string from const char* To char[500];

Copy the string from const char* To char[500];

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  • K ksaw123

    Hi all can you help? part of my code i need to do this

    const char * p= "ddddd";
    char q[500];

    I want to copy the sting in p to q[]?

    C Offline
    C Offline
    Cedric Moonen
    wrote on last edited by
    #3

    You can use strcpy_s[^]

    Cédric Moonen Software developer
    Charting control [v2.0] OpenGL game tutorial in C++

    1 Reply Last reply
    0
    • K ksaw123

      Hi all can you help? part of my code i need to do this

      const char * p= "ddddd";
      char q[500];

      I want to copy the sting in p to q[]?

      C Offline
      C Offline
      CPallini
      wrote on last edited by
      #4

      const char * p= "ddddd";
      char q[500];
      int i;
      i=0;
      while (p[i] && i < sizeof(q) - 1 )
      q[i++] = p[i];
      q[i]='\0';

      :)

      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.
      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
      [My articles]

      K C 2 Replies Last reply
      0
      • C CPallini

        const char * p= "ddddd";
        char q[500];
        int i;
        i=0;
        while (p[i] && i < sizeof(q) - 1 )
        q[i++] = p[i];
        q[i]='\0';

        :)

        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.
        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
        [My articles]

        K Offline
        K Offline
        ksaw123
        wrote on last edited by
        #5

        Thanks CPallini

        1 Reply Last reply
        0
        • C CPallini

          const char * p= "ddddd";
          char q[500];
          int i;
          i=0;
          while (p[i] && i < sizeof(q) - 1 )
          q[i++] = p[i];
          q[i]='\0';

          :)

          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.
          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
          [My articles]

          C Offline
          C Offline
          Cedric Moonen
          wrote on last edited by
          #6

          Why do you complicate your life that way :doh: Are you borde today :-D ?

          Cédric Moonen Software developer
          Charting control [v2.0] OpenGL game tutorial in C++

          C K 2 Replies Last reply
          0
          • C Cedric Moonen

            Why do you complicate your life that way :doh: Are you borde today :-D ?

            Cédric Moonen Software developer
            Charting control [v2.0] OpenGL game tutorial in C++

            C Offline
            C Offline
            CPallini
            wrote on last edited by
            #7

            Cedric Moonen wrote:

            Why do you complicate your life that way

            Actually it was pathetically simple. I'm always 'borde'! :-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.
            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
            [My articles]

            C 1 Reply Last reply
            0
            • C Cedric Moonen

              Why do you complicate your life that way :doh: Are you borde today :-D ?

              Cédric Moonen Software developer
              Charting control [v2.0] OpenGL game tutorial in C++

              K Offline
              K Offline
              killabyte
              wrote on last edited by
              #8

              Some would reach for the off the self "pirelli" wheel, others fashoin themselves the "pallini" wheel... both are high quality :-\

              C 1 Reply Last reply
              0
              • C CPallini

                Cedric Moonen wrote:

                Why do you complicate your life that way

                Actually it was pathetically simple. I'm always 'borde'! :-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.
                This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                [My articles]

                C Offline
                C Offline
                Cedric Moonen
                wrote on last edited by
                #9

                CPallini wrote:

                Actually it was pathetically simple.

                Yes I know that it was simple but you are suggesting to the OP that each time he has to copy a string, he should use this code. Honnestly, I really don't think it is a good idea because it makes the code much more difficult to understand (suppose that you repeat that code in a lot of places in your code X| ). And apparently, that's what the OP is going to do instead of using one of the "built in" mechanism.

                CPallini wrote:

                I'm always 'borde'

                Mh, yeah, I meant bored of course ;P

                Cédric Moonen Software developer
                Charting control [v2.0] OpenGL game tutorial in C++

                C 1 Reply Last reply
                0
                • C Cedric Moonen

                  CPallini wrote:

                  Actually it was pathetically simple.

                  Yes I know that it was simple but you are suggesting to the OP that each time he has to copy a string, he should use this code. Honnestly, I really don't think it is a good idea because it makes the code much more difficult to understand (suppose that you repeat that code in a lot of places in your code X| ). And apparently, that's what the OP is going to do instead of using one of the "built in" mechanism.

                  CPallini wrote:

                  I'm always 'borde'

                  Mh, yeah, I meant bored of course ;P

                  Cédric Moonen Software developer
                  Charting control [v2.0] OpenGL game tutorial in C++

                  C Offline
                  C Offline
                  CPallini
                  wrote on last edited by
                  #10

                  Cedric Moonen wrote:

                  Yes I know that it was simple but you are suggesting to the OP that each time he has to copy a string, he should use this code.

                  Nope, I would suggest him to use the library functions actually. I posted the code just to show how the task could be accomplished without using such functions (as a side note to other answers).

                  Cedric Moonen wrote:

                  Honnestly, I really don't think it is a good idea

                  I agree, because library functions are more general.

                  Cedric Moonen wrote:

                  because it makes the code much more difficult to understand (suppose that you repeat that code in a lot of places in your code Dead ).

                  I disagree. OP should have at least a rough idea on what happens behind the curtains of the library functions. Repeating the code is a very bad practice that I would never suggest. I suppose that showing a piece of code is not a boost to 'inline' code instead of properly 'wrap the code with a function and then call it everywhere it is needed'.

                  Cedric Moonen wrote:

                  And apparently, that's what the OP is going to do instead of using one of the "built in" mechanism

                  I'm really not so clever to guess OP intentions. Anyway I would suggest him to use library functions (that anyway are not, in my opinion, a built-in mechanism...). :)

                  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.
                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                  [My articles]

                  1 Reply Last reply
                  0
                  • K killabyte

                    Some would reach for the off the self "pirelli" wheel, others fashoin themselves the "pallini" wheel... both are high quality :-\

                    C Offline
                    C Offline
                    CPallini
                    wrote on last edited by
                    #11

                    killabyte wrote:

                    Some would reach for the off the self "pirelli" wheel, others fashoin themselves the "pallini" wheel... both are high quality

                    :laugh: Well, personally, I would never use hand-crafted tyres on my GSR. :rolleyes:

                    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.
                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                    [My articles]

                    1 Reply Last reply
                    0
                    • K ksaw123

                      Hi all can you help? part of my code i need to do this

                      const char * p= "ddddd";
                      char q[500];

                      I want to copy the sting in p to q[]?

                      S Offline
                      S Offline
                      Stuart Dootson
                      wrote on last edited by
                      #12

                      Well, you've not had a C++ answer using STL yet...so, just because:

                      // needs #include
                      const char * p= "ddddd";
                      char q[500];

                      std::copy(p, p+strlen(p), q);

                      Of course, it is less efficient than the pure C answers, as it iterates through p twice.

                      Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

                      C 1 Reply Last reply
                      0
                      • S Stuart Dootson

                        Well, you've not had a C++ answer using STL yet...so, just because:

                        // needs #include
                        const char * p= "ddddd";
                        char q[500];

                        std::copy(p, p+strlen(p), q);

                        Of course, it is less efficient than the pure C answers, as it iterates through p twice.

                        Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

                        C Offline
                        C Offline
                        CPallini
                        wrote on last edited by
                        #13

                        Stuart Dootson wrote:

                        // needs #include const char * p= "ddddd"; char q[500]; std::copy(p, p+strlen(p), q);

                        That's hybrid!

                        // needs a different #include!
                        const char * p= "ddddd";
                        char q[500];

                        std::string s(p);
                        s += '\0';
                        s.copy(q, s.length());

                        (I know, that's, well..., ugly! :rolleyes: ) :-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.
                        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                        [My articles]

                        S 1 Reply Last reply
                        0
                        • C CPallini

                          Stuart Dootson wrote:

                          // needs #include const char * p= "ddddd"; char q[500]; std::copy(p, p+strlen(p), q);

                          That's hybrid!

                          // needs a different #include!
                          const char * p= "ddddd";
                          char q[500];

                          std::string s(p);
                          s += '\0';
                          s.copy(q, s.length());

                          (I know, that's, well..., ugly! :rolleyes: ) :-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.
                          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                          [My articles]

                          S Offline
                          S Offline
                          Stuart Dootson
                          wrote on last edited by
                          #14

                          CPallini wrote:

                          That's hybrid

                          Hybrid's[^] good these days, maaaaan (allegedly).

                          CPallini wrote:

                          // needs a different #include! const char * p= "ddddd"; char q[500]; std::string s(p); s += '\0'; s.copy(q, s.length()); (I know, that's, well..., ugly! )

                          Well, if I'd known you were bringing strings, I'd've used this:

                          const std::string p = "ddddd";
                          std::string q;
                          q=p;

                          Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

                          C 1 Reply Last reply
                          0
                          • S Stuart Dootson

                            CPallini wrote:

                            That's hybrid

                            Hybrid's[^] good these days, maaaaan (allegedly).

                            CPallini wrote:

                            // needs a different #include! const char * p= "ddddd"; char q[500]; std::string s(p); s += '\0'; s.copy(q, s.length()); (I know, that's, well..., ugly! )

                            Well, if I'd known you were bringing strings, I'd've used this:

                            const std::string p = "ddddd";
                            std::string q;
                            q=p;

                            Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

                            C Offline
                            C Offline
                            CPallini
                            wrote on last edited by
                            #15

                            Stuart Dootson wrote:

                            const std::string p = "ddddd"; std::string q; q=p;

                            std::string q = "ddddd";

                            FFY :laugh:

                            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.
                            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
                            [My articles]

                            1 Reply Last reply
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