/*
输入一串字符串并打印，多余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;
}
