【单选题】图a所示电路中,L=4H,且 i (0_)=0,电压波形如图b所示,则当t=3S时,电感电流 i 为( )
【单选题】根据下面的定义,能印出字母m的语句是( )。 struct person{ char name[9]; int age; }; struct person class[10]={"john",17,"paul",19,"mary",18,"adam",16};
A.
printf("%c\n",class[3].name);
B.
printf("%c\n",class[3].name[1]);
C.
printf("%c\n",class[2].name[1]);
D.
printf("%c\n",clsaa[2].name[0]);