想问问这题为什么是4.5而不是3.5

Question

int b=7;float a=2.5,c=4.7;

a+(b/2*(int)(a+c)/2)%4

Answer 1

b/2=3 3*(int)(a+c)=21 21/2=10 10％4=2 a+2=4.5

Answer 2

int b=7;float a=2.5,c=4.7; a+(b/2*(int)(a+c)/2)%4 整数除整数=整数： b/2=7/2=3; a+c=2.5+4.7=7.2==>（int）7.2=7; 3*7/2=21/2=10; a+10%4=2.5+2=4.5