weixin_47743471的博客

报数#include<iostream>using namespace std;int main(){ int n, g, s, b, result[4] = { 0 }, i,j; cin >> n; for (i = 1,j=0; j < n; i++) { g = i % 10; s = i / 10 %10; b = i / 100; if (g == 7 || s == 7 || b == 7 || i % 7 == 0) .