C语言复习之输入多个空格，保留一个

 1 #include <stdio.h>
 2 
 3 int main()
 4 {
 5     int c = 0,flag = 0;
 6     printf("Clear blanks");
 7     while((c=getchar()) != EOF)
 8     {
 9         if(c == ' ')
10         {
11             if(flag == 0)
12             {
13                 flag = 1;
14             }
15             else
16             {
17                 continue;
18             }
19         }
20         else
21         {
22             flag = 0;
23             
24         }
25         printf("%c",c);
26     }
27 }