1ano/fp/aula04: tp04 codecheck exercises added

1ano/fp/aula03/ex12.py: comment added

1ano/fp/aula03/ex12.py

@@ -3,6 +3,9 @@ def main():
     for n in countdown(num):
         print(n)
 
+
+# Creates a range() function with the format range(n:0:-1)
+# The statement yield returns a value every repetition
 def countdown(n):
     while n > 0:
         yield n

1ano/fp/aula04/tp-codecheck/ex01.py

@@ -0,0 +1,40 @@
+# Example: finding and counting leap years
+# JMR 2019
+
+def isLeapYear(year):
+   return year%4 == 0 and year%100 != 0 or year%400 == 0
+
+def printLeapYears(year1, year2):
+   """Print all leap years in range [year1, year2[."""
+   for year in listLeapYears(year1, year2):
+      print(year)
+
+
+def numLeapYears(year1, year2):
+   """Return the number of leap years in range [year1, year2[."""
+   return len(listLeapYears(year1, year2))
+
+
+def listLeapYears(year1, year2):
+   """Return a list of leap years in range [year1, year2[."""
+   # (We'll get back to lists later in the course.)
+   lst = []
+   for year in range(year1, year2):
+      if isLeapYear(year):
+         lst.append(year)
+   
+   return lst
+
+
+# MAIN PROGRAM:
+def main():
+   printLeapYears(1870, 1921)
+
+   x = numLeapYears(1679, 2079)
+   print("In [1679, 2079[ there are", x, "leap years")
+
+   print(listLeapYears(1970, 2002))
+
+
+if __name__ == "__main__":
+   main()

1ano/fp/aula04/tp-codecheck/ex02.py

@@ -0,0 +1,19 @@
+# Read numbers until a sentinel (an empty string), and return their sum.
+# JMR 2018
+
+
+def inputTotal():
+   """Read numbers until empty string is entered and return the sum."""
+   tot = 0.0
+   while True:
+      n = input("valor? ") # input("valor? ")
+      if n == '': return tot
+      tot += float(n)
+
+# MAIN PROGRAM
+def main():
+   tot = inputTotal()
+   print(tot)
+
+if __name__ == "__main__":
+   main()

1ano/fp/aula04/tp-codecheck/ex03.py

@@ -0,0 +1,23 @@
+# Example: Print a multiplication table
+# Like:
+#   1 x 1  =   1
+#   1 x 2  =   2
+#   ...
+#  10 x 10 = 100
+#
+# Make the program print an empty line after each group of ten.
+# Also, use format specifiers to align the numbers.
+#
+# JMR 2019   
+
+def main():
+   for i in range (1, 11):
+      table(i)
+      print()
+
+def table(n):
+   for i in range(1, 11):
+      print(f'{n} x {i} = {n*i}')
+
+if __name__ == "__main__":
+   main()