If-statement assignment problem

Prompt: Write a function called movies that takes the starting times of two movies, hr1, hr2, min1, min2, and their durations, durmin1, durmin2, as its input arguments and decides whether we can binge and watch both. The criteria are that they must not overlap and that we are not going to wait more than 30 minutes between the end of one and the beginning of the next. It returns true if the criteria are both met and returns false otherwise. You may assume that movie start times are always after 1 pm and before midnight. You may also assume that the first one starts earlier. The order of the input arguments is: hr1, min1, durmin1, hr2, min2, durmin2.

Proposed solution:

function m = movies(hr1,min1,durmin1,hr2,min2,durmin2)
m1=hr1*60+min1;
m2=hr2*60+min2;
d1=m1+durmin1;
d2=m2+durmin2;
e=sum((m2-d1)==(1:30));
if e==1
      m=true;
else
      m=false;
end

The grader tells me it makes an error computing the input: movies(1,0,90,2,30,60) despite the fact that when I enter that input, it works just fine.

Any advice would be much appreciated.

Answer 1

[Walter Roberson]

Your code checks for a difference of 1 minute to 30 minutes. Your code does not test for the possibility that the gap is 0 minutes.