Museum

     Name
          cabs - Calculates the absolute value of a complex number.

     Syntax
          #include <math.h>

          double cabs(z)
          struct complex {
                 double x;    /* Real component      */
                 double y;    /* Imaginary component */
                      } z;

     Description
          The cabs function calculates the absolute value of a complex
          number, which must be a structure of type complex. A call to
          cabs is equivalent to the following:

          sqrt(z.x * z.x + z.y * z.y)


     Return Value
          On overflow, cabs calls matherr, returns HUGE_VAL, and sets
          errno to ERANGE.

     See Also
          abs(S), fabs(S), labs(DOS)

     Example
          #include <math.h> #include <stdio.h>

          main() {
                  struct complex number;
                  double d;
                  number.x = 3.0;
                  number.y = 4.0;
                  d = cabs(number);
                  printf("The absolute value of 'number' is %f\n", d);
          }

          Using cabs, this program assigns the absolute value of
          complex number value to d.

                                                (printed 6/18/89)