题解 | #字符个数统计#

#include <stdio.h>
#include <string.h>


#define max 1000
#define row 100
#define col 1001

//2021/7/3 - 17:41
//2021/7/3 - 17:47

int main()
{
   char s[max];
   char v[128];
   int i, j;
   gets(s);

   memset(v, 0, 128);

   for (i = 0; i < strlen(s); i++)
   {
      if ((s[i] >= 0) && (s[i] <= 127) && (s[i] != '\n'))
      {
         v[s[i]] = 1;
      }
   }

   for (i = 0, j = 0; i < 128; i++)
   {
      if (v[i] != 0)
      {
         j++;
      }
   }

   printf("%d", j);

   return 0;
}