c语言利用switch判断大小月

#include <stdio.h>

int main () {

int a;
scanf("%d",&a);
switch(a) {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:
      printf("solar month");
        break;
    case 2:
    case 4:
    case 6:
    case 9:
    case 11:
        printf("lunar month");
        break;
        default:
        printf("error");       
};
return 0;

}