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#yyds干货盘点# 名企真题专题：末尾0的个数
source link: https://blog.51cto.com/u_15488507/5974496
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#yyds干货盘点# 名企真题专题：末尾0的个数
精选 原创1.简述：
描述输入一个正整数n,求n!(即阶乘)末尾有多少个0？ 比如: n = 10; n! = 3628800,所以答案为2
输入描述：输入为一行，n(1 ≤ n ≤ 1000)
输出描述：输出一个整数,即题目所求
示例12.代码实现：
public class Main{
public static int test(int n){
if(n < 0){
return 0;
}
int res = 0;
while (n !=0){
res += n /5;
n = n/5;
}
return res;
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while (in.hasNextInt()) {
System.out.println( test(in.nextInt()));
}
}
}
public static int test(int n){
if(n < 0){
return 0;
}
int res = 0;
while (n !=0){
res += n /5;
n = n/5;
}
return res;
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
while (in.hasNextInt()) {
System.out.println( test(in.nextInt()));
}
}
}
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