这段程序应该怎么理解呢，为什么运行结果为4

c = 'A' k++,k = 1,break, k++,k = 2
c = 'B' k--, k = 1, k+= 2, k = 3,break, k++, k = 4
c = 'C' k+= 2, k = 6,break, k++, k = 7
c = 'D' k%=2, k = 1,continue
c = 'E' k*= 10, k = 10, break;k++, k = 11
c = 'F' k/=3, k = 3, k++, k = 4
c = 'G'退出循环
k = 4