ch2-3.c

单片机接口技术(C51版)例程源代码

#include"stdio.h"
void main()
{
  char c;
  printf("input a character: ");
  c=getchar();
  if(c<32)
     printf("This is a control character\n");
   else if(c>='0'&&c<='9')
      printf("This is a digit\n");
     else if(c>='A'&&c<='Z')
       printf("This is a capital letter\n");
      else if(c>='a'&&c<='z')
        printf("This is a small letter\n");
       else
         printf("This is an other character\n");
}