按格式修改日期.c

/*输入：Enter date(mm/dd/yy):
 * 输出：Dated this 19th day of July,2014.
 */
#include <stdio.h>
int main(void)
{
	int month,date,year;
	printf("Enter date(mm/dd/yy):");
	scanf("%d/%d/%d",&month,&date,&year);
	printf("Dated this %d",date);
	switch(date) {
	
		case 1: case 21: case 31:
			printf("st");
			break;
		case 2: case 22:
			printf("nd");
			break;
		case 3: case 23:
			printf("rd");
			break;
		default:
			printf("th");
			break;
	}
	printf(" day of ");
	switch(month){
		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("October"); break;
		case 11:
			printf("November"); break;
		case 12:
			printf("December"); break;
	}
	printf(", 20%.2d.\n",year);

	return 0;
}