多个空格 用一个空格替换输出
#define TMP 'a'

void main(int argc , char *argv)
{
char c ,chartmp ;

chartmp = TMP;
int a;
while((a=(c == getchar())) != 10)
{
if (c != ' ')
putchar(c);
if (c == ' ')
{
if(chartmp != ' ')
putchar(c);
}
chartmp = c;
}
}

[解决办法]
while((a=(c == getchar())) != 0)

[解决办法]

C/C++ code

#include <stdio.h>int main(int argc , char **argv){    char c ,chartmp ;    while((c=getchar()) != EOF)    {        if (c != ' ')        {            putchar(c);        }        else if(chartmp != ' ')        {                putchar(c);        }        chartmp = c;     }    return 0;}