华为oj_(练习用)挑7

#include <iostream>using namespace std;int Isrelation(int m){    if(m%7==0)        return 1;    while(m)    {        if(m%10==7)            return 1;        m/=10;    }    return 0;}int main(){    int n,i;    int count;    while(cin>>n)    {        count=0;        for(i=7;i<=n;i++)            if(Isrelation(i))                count++;        cout<<count<<endl;    }    return 0;}