Passing structs to functions

Question

I am having trouble understanding how to pass in a struct  by reference  to a function so that the struct s member functions can be populated  So far I have written  bool data struct  sampleData        int main int argc  char  argv             struct sampleData                int N          int M          string sample name          string speaker                   data sampleData       The error I get is   C   requires a type specifier for all declarations bool data const  amp testStruct   I have tried some examples explained here  Simple way to pass temporary struct by value in C    Hope someone can Help me

User · Answer

bool data sampleData  data        You need to tell the method which type of struct you are using  In this case  sampleData   Note  In this case  you will need to define the struct prior to the method for it to be recognized   Example   struct sampleData      int N     int M                bool data struct  sampleData        int main int argc  char  argv             sampleData sd        data  amp sd        Note 2  I m a C guy  There may be a more c  ish way to do this

User · Answer

Passing structs to functions by reference  simply      define maxn 1000  struct solotion       int sol maxn       int arry h maxn       int cat maxn       int scor maxn        void inser solotion  amp come       come sol 0  2     void initial solotion  amp come       for int i 0 i lt maxn i            come sol i  0     int main         solotion sol1      inser sol1       solotion sol2      initial sol2

User · Answer

It is possible to construct a struct inside the function arguments  function    variable   PUT DATA HERE

User · Answer

First  the signature of your data   function   bool data struct  sampleData    cannot possibly work  because the argument lacks a name  When you declare a function argument that you intend to actually access  it needs a name  So change it to something like   bool data struct sampleData  samples    But in C    you don t need to use struct at all actually  So this can simply become   bool data sampleData  samples      Second  the sampleData struct is not known to data   at that point  So you should declare it before that   struct sampleData       int N      int M      string sample name      string speaker      bool data sampleData  samples        samples- gt N   10      samples- gt M   20         etc      And finally  you need to create a variable of type sampleData  For example  in your main   function   int main int argc  char  argv          sampleData samples      data  amp samples       Note that you need to pass the address of the variable to the data   function  since it accepts a pointer   However  note that in C   you can directly pass arguments by reference and don t need to  emulate  it with pointers  You can do this instead      Note that the argument is taken by reference  the   amp   in front    of the argument name   bool data sampleData  amp samples        samples N   10      samples M   20         etc     int main int argc  char  argv          sampleData samples          No need to pass a pointer here  since data   takes the        passed argument by reference      data samples

[c++] Passing structs to functions

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