a program everyday

/*
//输入一串字符串并打印，多有一个空格则只输出一个
*/
#include<stdio.h>
void printString()
{
 char lastc = 'a';
 char c;
 c = getchar();
 while(c != EOF)
 {
  if(c !=' ')
  {
   putchar(c);
   lastc = c;
   c = getchar();
        }
  else
  {
   if(lastc != ' ')
               putchar(c);
      lastc = c;
      c = getchar();
  }
 }
}
int main()
{
    printString();
 return 1;
}