Library /sys$common/syshlp/helplib.hlb  —  CRTL  pow  Example
        #include <stdio.h>
        #include <math.h>
        #include <errno.h>

        main()
        {
            double x;

            errno = 0;

            x = pow(-3.0, 2.0);
            printf("%d, %f\n", errno, x);
        }

      This example program outputs the following:

        0, 9.000000
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