使用枚举变量编写一个程序，已知某天是星期几，计算出下一天是星期几。

#include
   int main()
{
enum Week{Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday}week;
char c[1][20],a[7][20]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
int d=0,i;
printf("Today is ");
scanf("%s",c);
for(i=0;i<7;i++)
{
    if(a[i][1]==c[0][1]&&a[i][0]==c[0][0])//判断前两个字母是否相同。
    d++;
    if(d==1)
    break;
}
        week=(enum Week)(i);
        printf("Tomorrow is ");
        if(week