/*
 * complex number ADT
 */
#include <stdio.h>
#include <math.h>
#include "complex.h"
/*  function to add two complex numbers and return the sum       */
complex_t
add_c(complex_t c1, complex_t c2)  {
  complex_t c_sum;
  printf("modified\n");
  c_sum.real = c1.real + c2.real;
  c_sum.imag = c1.imag + c2.imag;
  return(c_sum);                      /* returns a complex number  */
}
/* function to subtract two complex numbers and return difference */
complex_t
sub_c(complex_t c1, complex_t c2)  {
  complex_t c_diff;
  c_diff.real = c1.real - c2.real;
  c_diff.imag = c1.imag - c2.imag;
  return(c_diff);
}
/* function to multiply two complex numbers and return product   */
complex_t
mult_c(complex_t c1, complex_t c2)  {
  complex_t c_prod;
  c_prod.real = (c1.real * c2.real) - (c1.imag * c2.imag);
  c_prod.imag = (c1.real * c2.imag) + (c1.imag * c2.real) ;
  return(c_prod);
}