输入输出挂

int Scan()
{
int res = 0, ch, flag = 0;
if((ch = getchar()) == ‘-‘)
flag = 1;
else if(ch >= ‘0’ && ch <= ‘9’)
res = ch - ‘0’;
while((ch = getchar()) >= ‘0’ && ch <= ‘9’ )
res = res * 10 + ch - ‘0’;
return flag ? -res : res;
}

void Out(int a) //输出外挂
{
if(a>9)
Out(a/10);
putchar(a%10+’0’);
}