将连续空格合并

#include<cstdio>

void input()
{
    char c,lastc='a';
    scanf("%c",&c);
    while(c!=EOF)
    {
        if(c!=' ')
        {
            putchar(c);
            lastc=c;
            scanf("%c",&c);
        }
        else
        {
            if(lastc!=' ')
                putchar(c);
            lastc=c;
            scanf("%c",&c);
        }
    }
}

int main()
{
    input();
    return 0;
}