Help compiling NEC2 on an Intergraph.

I am trying to compile NEC2, the C version, on an Intergraph. I get the
following Error:

"at.c", line 10: warning: a non-void function should return a value
  }
  ^

"at.c", line 5 (col. 5): warning: parameter "n" declared and never referenced

"at.c", line 17: warning: a non-void function should return a value
  }
  ^

"at.c", line 13 (col. 5): warning: parameter "n" declared and never referenced

Assembler: at.c
        Cannot open output file, 'at.o'.
cc: pass 'a' failed.
*** Error code 127

This is what I have for at.c;

int atoi();
double atof();
int atoi_(x,j,n)
char *x;
int n,*j;
{
int i;
i = atoi(x);
*j = i;
}
double atof_(x,j,n)
char *x;
int n;
double *j;
{
*j = (atof(x));
}

Can any one help?

-- 
.      '''
.     (o o)
___ooO-(_)-Ooo________________________________________________________
Peter D. Richeson                    | "I don't believe in a no-win   |
Email: richesop_at_matrix.hv.boeing.com |  scenaro."                     |
Phone  (205)461-2603                 |    - Admiral James T. Kirk     |
http://matrix.hv.boeing.com/~richesop|                                |
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I do not speak for any one but me, and some times not even for me.
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