int(a+c)= 7；

But I think we should first calculate 3 * (int) (a+b) = 21; b/2 1 = 0； 0/2=0; (int)(0)= 0； 0%4=0; The answer is 2.5. Priority should be */%. Follow the principle from left to right.

a+c = 7.2； Rounded by int, it is 7, multiplied by 3, divided by b, and finally divided by 2.

Personally, I think there is no problem.