RosettaCodeData/Task/Calendar/EasyLang/calendar.easy

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year = 1969
# year = number substr timestr systime 1 4
#
wkdays$ = "Su Mo Tu We Th Fr Sa"
pagewide = 80
blank$ = ""
month$[] = [ " January " " February " " March " " April " " May " " June " " July " " August " " September" " October " " November " " December " ]
days[] = [ 31 28 31 30 31 30 31 31 30 31 30 31 ]
#
func$ center txt$ .
h$ = substr blank$ 1 ((pagewide - len txt$) / 2)
return h$ & txt$ & h$
.
func$ makewk fst lst day .
for i to day - 1
wstr$ &= " "
.
for i = fst to lst
i$ = i
if i <= 9 : i$ = " " & i
wstr$ &= i$ & " "
.
return substr wstr$ & blank$ 1 20
.
proc dow y &ndow &leap .
leap = 0
if y mod 4 = 0 : leap = 1
if y mod 100 = 0 : leap = 0
if y mod 400 = 0 : leap = 1
ndow = y * 365 + y div 4 - y div 100 + y div 400 + 1
ndow = (ndow - leap) mod1 7
.
len lin$[] 8
proc prmonth nmonth newdow monsize .
lin$[1] &= " " & month$[nmonth] & " "
lin$[2] &= wkdays$ & " "
lin$[3] &= makewk 1 (8 - newdow) newdow & " "
for i = 4 to 7
lin$[i] &= makewk (9 + h - newdow) lower monsize (15 + h - newdow) 1 & " "
h += 7
.
lin$[8] &= makewk (37 - newdow) monsize 1 & " "
if len lin$[3] + 22 > pagewide
for i to 8
print center lin$[i]
lin$[i] = ""
.
.
.
for i to pagewide : blank$ &= " "
dow year newdow leap
print center "[ picture of Snoopy goes here ]"
print center year
for i = 1 to 12
monsize = days[i]
if i = 2 and leap = 1 : monsize = 29
prmonth i newdow monsize
newdow = (monsize + newdow) mod1 7
.