#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<iostream>
using namespace std;
/* 1
-------------
1
1 + ------
1
1+ -----
1+1
*/
float dequy(float n)
{
if(n==1)
return 0.5;
return 1/(1+dequy(n-1));
}
// đếm số lượng phần tử
int dequy1(int n)
{
if(n==0)
return 0;
return dequy1(n/10)+1;
}
int main()
{
cout<<dequy1(123);
system("pause");
return 0;
}
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