c语言任意输入英文的星期几,输入字母，判断星期几，求大神指点

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#include

void uh() //判断周二还是周三

{ char sec;

printf("请继续输入&＃xff1a;\n");

bq:scanf("%c",&sec);

if(sec&＃61;&＃61;&＃39;u&＃39;||sec&＃61;&＃61;&＃39;U&＃39;)

printf("It is Tuesday!\n");

else if(sec&＃61;&＃61;&＃39;H&＃39;||sec&＃61;&＃61;&＃39;h&＃39;)

printf("It is Thursday!\n");

else

{

goto bq;

}

}

void au()//判断周六还是周日

{ char sec;

printf("请继续输入&＃xff1a;\n");

bq:scanf("%c",&sec);

if(sec&＃61;&＃61;&＃39;a&＃39;||sec&＃61;&＃61;&＃39;A&＃39;)

printf("It is Saturday!\n");

else if(sec&＃61;&＃61;&＃39;u&＃39;||sec&＃61;&＃61;&＃39;U&＃39;)

printf("It is Sunday!\n");

else

{

goto bq;

}

}

void main()

{

char fir;

printf("请输入字母&＃xff1a;");

bq:scanf("%c",&fir);

switch(fir)

{

case &＃39;m&＃39;:

case &＃39;M&＃39;:printf("Monday\n");break;

case &＃39;t&＃39;:

case &＃39;T&＃39;:printf("Tuesday,Thursday?\n");

uh();

break;

case &＃39;w&＃39;:

case &＃39;W&＃39;:printf("Wendnesday\n");break;

case &＃39;f&＃39;:

case &＃39;F&＃39;:printf("Friday\n");break;

case &＃39;s&＃39;:

case &＃39;S&＃39;:printf("Saturday,Sunday?\n");

au();

break;

default :goto bq;

}

}