x是0~100之间的整数,根据以下if语句写出等价的switch语句。
if(x < 60) m = 1;
else if(x < 70) m = 2;
else if(x < 80) m = 3;
else if(x < 90) m = 4;
else m = 5;
switch( 1 )
{
( 2 ) m = 5;break;
case 6:m = 2;break;
case 7:m = 3;break;
case 8:m = 4;break;
( 3 ) m = 1;
}