#include<stdio.h>
main()
{
int a;
printf("请输入一个数字 ");
scanf("%d",&a);
switch(a)
{
case 1:printf("M "); break;
case 2:printf("T "); break;
case 3:printf("W "); break;
case 4:printf("TH "); break;
case 5:printf("F "); break;
case 6:printf("S "); break;
case 7:printf("SU "); break;
default:printf("error ");
}
}