Question

I have the below mentioned function in a large piece of code(in c++):

void startup(const char *&      start,
    const char *&   stop);

After this function has been called I want to access the character values i.e string stored between ‘start’ and ‘stop’.

The way I am trying to access the same is:

 char *var=(c.start);
  cout<<"\n Iterating over char pointer \n";
  while(var<=(c.stop))
  {
      cout<<*var;
      var++;
  }
  cout<<"\n";

However, while trying to access it this way I am getting the below mentioned error:

  error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive]

Can someone be kind enough to rectify the error…and help me access the character values

Answer 1

All you need to do is replace the line:

char *var=(c.start);

with:

const char *var=(c.start);

Note that that const refers to the character pointed to by the pointer, not the pointer itself. So an expression like var++ is perfectly fine, since the pointer isn’t const.