程序代码：

#include<stdio.h>
#include<ctype.h>
int judge(char c);
main()
{
  char c;
  while((c=getchar())!=EOF)
    printf("%d\n",judge(c));
}
int judge(char c)
{
  if(isalpha(c))
    if(isupper(c))
      return c-'A'+1;
    else
      return c-'a'+1;
  else
    return -1;
}