输入一个整数，如果该整数介于1到12之间，则输出对应的月份，比如输入为4，则输出”April“ -_-!；否则输出”not valid month number“

#include "stdio.h"
main()
{
   int i;
   scanf("%d",&i);
   switch(i)
    {
     case 1:printf("January");
     break;
     case 2:printf("February");
     break;
     case 3:printf("March");
     break;
     case 4:printf("April");
     break;
     case 5:printf("MAY");
     break;
     case 6:printf("June");
     break;
     case 7:printf("July");
     break;
     case 8:printf("August");
     break;
     case 9:printf("september");
     break;
     case 10:printf("Octomber");
     break;
     case 11:printf("November");
     break;
     case 12:printf("December");
     break;
     default: printf("not valid month number");
    }
}