int main( )
{
int i, j, k;
loop: printf("Input a number(小於等於1萬) : ");
scanf("%d",&i);
if(i>=10000)
{
printf("輸入有誤，請重新輸入\n");
goto loop;
}
else
{
j = i * i;
k = 1;
while(i/k != 0)
{
if(j%k == i%k)
{
k *= 10;
}
else
break;
}
if(i/k == 0)
printf("%d yes,%d*%d=%d",i, i, i, j);
else
printf("%d no,%d*%d=%d",i, i, i, j);
return 0 ;
}
}