Write an algorithm using pseudocode which takes temperatures input over a 100 day period (once per day) and output the number of days when the temperature was below 20C and the number of days when the temperature was 20C or above.

(NOTE: since the number of inputs is known, a for ... to loop can be used. However, a while loop or a repeat loop would work just as well).

total1 = 0: total2 = 0

for days = 1 to100

input temperature

if temperature < 20 then total1 = total1 + 1

else total2 = total2 + 1

endif

next

print total1, total2

This is a good illustration of an algorithm which could be written using the case construct instead of if ... then ... else. The following section of code replaces the statements if temperature < 20 then ...... endif:

case temperature of

1: total1 = total1 + 1

2: total2 = total2 + 1

Endcase