题解 | #字符个数统计#

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

int main(void)
{
  char DataBuff[502];
  int dataCompare[128] = {0};
  int dataBuffLen = 0;
  int count = 0;

  fgets(DataBuff, 502, stdin);
  dataBuffLen = strlen(DataBuff);

  for(int i=0; i<dataBuffLen; i++)
  {
      if(0 <= DataBuff[i] && 127 >= DataBuff[i])
      {
          if('\n' != DataBuff[i])
          {
              dataCompare[DataBuff[i]] = 1;
          }
      }

  }

  for(int i=0; i<128; i++)
  {
      if(1 == dataCompare[i])
      {
          count++;

      }
  }
  printf("%d",count);

  return 0;
}