🚀 go-pugleaf

klg0582@uxa.cso.uiuc.edu (Ken-Huang Lin) writes:

> I would like to have some "global variables" remain alive even after the
> program ends so that the next program can access them. I tried to set
> environment variables inside the program using
>    system("set v=...");
> in Turbo C. Unfortunately, the effect is only local to that program. Is
> there any way to set the global environment variables in a program? Or is
> there a better way to serve the same purpose?

There is a way you can search backward through memory blocks and find the 
"real" environment table, but there is a much better way.  Write the 
variables into a file...
   int write_vars()
   {
     FILE *f;
     f=fopen("globvar.dat","wb");
     if (f==NULL) return 0;        /* error creating file */
     fprintf(f,"%d\n",v);
     fprintf(f,"%s\n",misc_string);
     /* ... */
     fclose(f);
   }
Then read them in with your second program.



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