private static int numOfZero(int n) {
?? int count = 0;
?? int data = 1;
?? for (int i = 1; i <= n; i++) {
??? data = data * i;
??? while (data % 10 == 0) {
???? count++;
???? data = data / 10;
??? }
??? data = data % 10;// 只保留個位數字，因其它位數字對0的個數無影響
?? }
?? return count;
}
posted on 2009-08-21 00:45
jadmin 閱讀(96)
評論(0) 編輯 收藏