/* ---------------------------------- */
/* save as c17b.c                    */
/* --------------------------------- */
#include  "x_hfile.h"
#include       "fb.h"
/* --------------------------------- */
int main(void)
{
double ay,by,ny,
        nx,nz,M;
 
 clrscrn();
 printf(" f : x,y,z -> %s\n\n", feq);

 printf(" v : y,z   -> %s  \n", veq);
 printf(" u : y,z   -> %s\n\n", ueq);
 
 printf(" t : y     -> %s  \n", teq);
 printf(" s : y     -> %s\n\n", seq);
 
 ay = -1;
 by =  1;
 ny = 2*150; nx = 2*150; nz = 2*150;

 M =  trapezoid_dxdzdy(   f,
                            ay,by,ny,
                            sz,tz,nz,
                            ux,vx,nx);

 printf(" With the trapezoidal's rule.\n\n\n");
 printf("        (%+.1f  (%s     (%s    \n", by, teq, veq);
 printf(" A = int(   int(    int(      %s  dx dz dy = %.6f\n",feq, M);
 printf("        (%+.1f  (%s     (%s\n\n\n", ay, seq, ueq);

 stop();

 return 0;
}
/* --------------------------------- */