若有定义float x=1.5;int a=1,b=3,c=2;,则正确的switch语句是A.swimh(x) {case 1.0:printf("*\n"
A.swimh(x) {case 1.0:printf("*\n"); case 2.0:printf("**\n");}
B.switch((int)x); {case 1:printf("*\n"); case 2:printf("**\n");}
C.switch(a+
D. {case 1:pfintf("*\n"); case 2+1:pfintf("**\n");}switch(a-I-{case 1:pfintf("*\n"); case c:printf("**\n");}