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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <math.h> |
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#include <ctype.h> |
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#include "sun.h" |
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#include "color.h" |
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extern double stadj(), sdec(), sazi(), salt(), tz2mer(); |
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|
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#ifndef PI |
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#define PI 3.14159265358979323846 |
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#endif |
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#define S_UNIF 3 |
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#define S_INTER 4 |
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#define overcast (skytype==S_OVER|skytype==S_UNIF) |
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#define overcast ((skytype==S_OVER)|(skytype==S_UNIF)) |
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|
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double normsc(); |
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/* sun calculation constants */ |
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extern double s_latitude; |
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extern double s_longitude; |
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extern double s_meridian; |
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|
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#undef toupper |
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#define toupper(c) ((c) & ~0x20) /* ASCII trick to convert case */ |
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char zname[8]; /* time zone name (all caps) */ |
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float zmer; /* standard meridian */ |
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} tzone[] = { |
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"YST", 135, "YDT", 120, |
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"PST", 120, "PDT", 105, |
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"MST", 105, "MDT", 90, |
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"CST", 90, "CDT", 75, |
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"EST", 75, "EDT", 60, |
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"AST", 60, "ADT", 45, |
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"NST", 52.5, "NDT", 37.5, |
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"GMT", 0, "BST", -15, |
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"CET", -15, "CEST", -30, |
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"EET", -30, "EEST", -45, |
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"AST", -45, "ADT", -60, |
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"GST", -60, "GDT", -75, |
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"IST", -82.5, "IDT", -97.5, |
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"JST", -135, "NDT", -150, |
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"NZST", -180, "NZDT", -195, |
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"", 0 |
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{"YST", 135}, {"YDT", 120}, |
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{"PST", 120}, {"PDT", 105}, |
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{"MST", 105}, {"MDT", 90}, |
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{"CST", 90}, {"CDT", 75}, |
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{"EST", 75}, {"EDT", 60}, |
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{"AST", 60}, {"ADT", 45}, |
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{"NST", 52.5}, {"NDT", 37.5}, |
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{"GMT", 0}, {"BST", -15}, |
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{"CET", -15}, {"CEST", -30}, |
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{"EET", -30}, {"EEST", -45}, |
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{"AST", -45}, {"ADT", -60}, |
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{"GST", -60}, {"GDT", -75}, |
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{"IST", -82.5}, {"IDT", -97.5}, |
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{"JST", -135}, {"NDT", -150}, |
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{"NZST", -180}, {"NZDT", -195}, |
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{"", 0} |
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}; |
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/* required values */ |
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int month, day; /* date */ |
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int dosun = 1; |
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double zenithbr = 0.0; |
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int u_zenith = 0; /* -1=irradiance, 1=radiance */ |
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double turbidity = 2.75; |
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double turbidity = 2.45; |
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double gprefl = 0.2; |
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/* computed values */ |
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double sundir[3]; |
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char *progname; |
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char errmsg[128]; |
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void computesky(void); |
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void printsky(void); |
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void printdefaults(void); |
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void userror(char *msg); |
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double normsc(void); |
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int cvthour(char *hs); |
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void printhead(int ac, char **av); |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int got_meridian = 0; |
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int i; |
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progname = argv[0]; |
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day = atoi(argv[2]); |
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if (day < 1 || day > 31) |
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userror("bad day"); |
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cvthour(argv[3]); |
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got_meridian = cvthour(argv[3]); |
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} |
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for (i = 4; i < argc; i++) |
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if (argv[i][0] == '-' || argv[i][0] == '+') |
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s_longitude = atof(argv[++i]) * (PI/180); |
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break; |
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case 'm': |
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if (got_meridian) { |
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++i; |
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break; /* time overrides */ |
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} |
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s_meridian = atof(argv[++i]) * (PI/180); |
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break; |
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default: |
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else |
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userror("bad option"); |
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|
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if (fabs(s_meridian-s_longitude) > 45*PI/180) |
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if (month && !tsolar && fabs(s_meridian-s_longitude) > 45*PI/180) |
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fprintf(stderr, |
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"%s: warning: %.1f hours btwn. standard meridian and longitude\n", |
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"%s: warning - %.1f hours btwn. standard meridian and longitude\n", |
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progname, (s_longitude-s_meridian)*12/PI); |
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printhead(argc, argv); |
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} |
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|
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computesky() /* compute sky parameters */ |
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void |
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computesky(void) /* compute sky parameters */ |
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{ |
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double normfactor; |
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/* compute solar direction */ |
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} |
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|
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|
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printsky() /* print out sky */ |
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void |
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printsky(void) /* print out sky */ |
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{ |
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if (dosun) { |
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printf("\nvoid light solar\n"); |
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} |
296 |
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|
297 |
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|
298 |
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printdefaults() /* print default values */ |
298 |
> |
void |
299 |
> |
printdefaults(void) /* print default values */ |
300 |
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{ |
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switch (skytype) { |
302 |
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case S_OVER: |
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} |
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|
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|
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userror(msg) /* print usage error and quit */ |
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< |
char *msg; |
332 |
> |
void |
333 |
> |
userror( /* print usage error and quit */ |
334 |
> |
char *msg |
335 |
> |
) |
336 |
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{ |
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if (msg != NULL) |
338 |
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fprintf(stderr, "%s: Use error - %s\n", progname, msg); |
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|
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|
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double |
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< |
normsc() /* compute normalization factor (E0*F2/L0) */ |
347 |
> |
normsc(void) /* compute normalization factor (E0*F2/L0) */ |
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{ |
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static double nfc[2][5] = { |
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/* clear sky approx. */ |
352 |
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/* intermediate sky approx. */ |
353 |
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{3.5556, -2.7152, -1.3081, 1.0660, 0.60227}, |
354 |
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}; |
355 |
< |
register double *nf; |
355 |
> |
double *nf; |
356 |
|
double x, nsc; |
357 |
< |
register int i; |
357 |
> |
int i; |
358 |
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/* polynomial approximation */ |
359 |
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nf = nfc[skytype==S_INTER]; |
360 |
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x = (altitude - PI/4.0)/(PI/4.0); |
366 |
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} |
367 |
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|
368 |
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|
369 |
< |
cvthour(hs) /* convert hour string */ |
370 |
< |
char *hs; |
369 |
> |
int |
370 |
> |
cvthour( /* convert hour string */ |
371 |
> |
char *hs |
372 |
> |
) |
373 |
|
{ |
374 |
< |
register char *cp = hs; |
375 |
< |
register int i, j; |
374 |
> |
char *cp = hs; |
375 |
> |
int i, j; |
376 |
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|
377 |
< |
if (tsolar = *cp == '+') cp++; /* solar time? */ |
377 |
> |
if ( (tsolar = *cp == '+') ) cp++; /* solar time? */ |
378 |
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while (isdigit(*cp)) cp++; |
379 |
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if (*cp == ':') |
380 |
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hour = atoi(hs) + atoi(++cp)/60.0; |
384 |
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} |
385 |
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while (isdigit(*cp)) cp++; |
386 |
|
if (!*cp) |
387 |
< |
return; |
387 |
> |
return(0); |
388 |
|
if (tsolar || !isalpha(*cp)) { |
389 |
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fprintf(stderr, "%s: bad time format: %s\n", progname, hs); |
390 |
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exit(1); |
396 |
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break; |
397 |
|
if (!cp[j] && !tzone[i].zname[j]) { |
398 |
|
s_meridian = tzone[i].zmer * (PI/180); |
399 |
< |
return; |
399 |
> |
return(1); |
400 |
|
} |
401 |
|
} while (tzone[i++].zname[0]); |
402 |
|
|
409 |
|
} |
410 |
|
|
411 |
|
|
412 |
< |
printhead(ac, av) /* print command header */ |
413 |
< |
register int ac; |
414 |
< |
register char **av; |
412 |
> |
void |
413 |
> |
printhead( /* print command header */ |
414 |
> |
int ac, |
415 |
> |
char **av |
416 |
> |
) |
417 |
|
{ |
418 |
|
putchar('#'); |
419 |
|
while (ac--) { |