【题目】 #include<stdio.h>

       void main()

       {

           int x=5;

           switch(2*x-3) {

             case 4: printf(“%d “,x);

             case 7: printf(“%d “,2*x+1);

             case 10: printf(“%d “,3*x-1); break;

             default: printf(“%s”,”default\n”);

           }

       }