程序代码：

#include <stdio.h>
#include <stype.h>
int main (void)
{
  char ch;
  
  ch = get_first();
  putchar(ch);
  putchar('\n')
  return 0;
}
char get_first (void)
{
  int ch;
  char c;
  
  c = getchar();
  if(!isspace(c))
    ch = c;
  while (getchar() != '\n')
    continue;
  return ch;
}

程序代码：

char get_first (void)
{
  int ch;
  
  ch = getchar();
  while (getchar() != '\n')
    continue;
  return ch;
}

程序代码：

#include <stdio.h>
#include <ctype.h>
char get_first (void);
int main (void)
{
  char ch;
  
  ch = get_first();
  putchar(ch);
  putchar('\n')
  return 0;
}
char get_first (void)
{
  int ch;
  char c;
  
  c = getchar();
  if(!isspace(c))
    ch = c;
  while (getchar() != '\n')
    continue;
  return ch;
}