Re: Postgresql 9.5 and Shell scripts/variables vs. C programming/defining a value to be used

I think I understand. 

When I use this in my code I get 

"undefined reference to `PQexecParms' 

when compiling.

references in main is

const char *conninfo; /* connection string  to the database */ 

PGconn *conn; /* connection to the database */

PGresult *res; /* result of sql query */ 

int   nFields;  /* print out the attribute names */

int i; / * print the columns */

     j;

Is the a reserved reference to use with

Reserved res = PQexecParms(conn.... )

Then I assume that I have to use another reference than res.

Thanks.

/Poul