麻烦帮忙看看哪里错了?
#include <stdio.h>void main()
{char ch;
printf("Input a character:");
scanf("%c",&ch);
if(ch>='a'&&ch<='z')
printf("alpha\n");
if(ch>='A'&&ch<='Z')
printf("alpha\n");
if(ch>='0'&&ch<='9')
printf("number\n");
else
printf("other\n");
}