Mathc initiation/Fichiers h : c17bb
Apparence
Installer ce fichier dans votre répertoire de travail.
kgt_c.h |
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/* --------------------------------- */
/* save as kgt_c.h */
/* --------------------------------- */
void G_Tanxy(
CTRL_splot w,
double (*P_f) (double t),
double (*P_g) (double t),
double (*PDgDf)(double t),
tvalue t
)
{
double a = (*PDgDf)(t.value);
double b =(-(*PDgDf)(t.value)*(*P_f)(t.value)+(*P_g)(t.value));
FILE *fp = fopen("a_main.plt","w");
fprintf(fp," set zeroaxis lt 8 lw 2 \n"
" set size ratio -1\n"
" plot [%0.3f:%0.3f] [%0.3f:%0.3f]\\\n"
" \"a_pts\" with line lt 6 lw 3,\\\n"
" %0.6f*x %+0.6f lt 7 lw 3,\\\n"
" \"a_P\" lt 6 lw 8,\\\n"
" \"axP\" lt 8 lw 5,\\\n"
" \"ayP\" lt 8 lw 5\n",
w.xmin,w.xmax,w.ymin,w.ymax,
a,b);
fclose(fp);
fp = fopen("a_P","w");
fprintf(fp," %0.6f %0.6f",(*P_f)(t.value), (*P_g)(t.value) );
fclose(fp);
fp = fopen("axP","w");
fprintf(fp," %0.6f 0.",
((*P_f)(t.value))-((*P_g)(t.value))/((*PDgDf)(t.value)));
fclose(fp);
fp = fopen("ayP","w");
fprintf(fp," 0. %0.6f",
((*P_g)(t.value))-(((*PDgDf)(t.value))*((*P_f)(t.value))));
fclose(fp);
fp = fopen("a_pts","w");
for(t.value=t.min; t.value<=t.max; t.value+=t.step)
fprintf(fp," %6.6f %6.6f\n",(*P_f)(t.value),(*P_g)(t.value));
fclose(fp);
}
/* --------------------------------- */
/* --------------------------------- */