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蓝桥杯备赛day01：循环

news 来源：原创 2024/9/20 6:20:27

这类题目较为简单，就不写解析了，提供三种语言的参考代码，欢迎在评论区讨论！

分离整数的各个位数

#include<iostream>
using namespace std;
int main(){int n;cin>>n;while(n>0){cout<<n%10<<" ";n=n/10;}return 0;
}

n = int(input())
while n > 0:print(n % 10, end=' ')n = n // 10

import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int n = scanner.nextInt();while (n > 0) {System.out.print(n % 10 + " ");n = n / 10;}scanner.close();}
}

数字统计

#include<iostream>
using namespace std;
int main()
{//读入L和Rint L,R;cin>>L>>R;//范围[L, R]的所有整数int sum = 0;//sum和for(int i = L;i<=R;i++){//i遍历了L到R的所有数字int j = i;//i在循环里发生了变化，应该用别的数来存i。while(j>0){if(j%10==2){//判断此时的个位数是否是数字2.sum++;}j/=10;}}//输出cout<<sum;return 0;
}

L, R = map(int, input().split())sum_count = 0
for i in range(L, R + 1):j = iwhile j > 0:if j % 10 == 2:sum_count += 1j //= 10print(sum_count)

import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int L = scanner.nextInt();int R = scanner.nextInt();int sumCount = 0;for (int i = L; i <= R; i++) {int j = i;while (j > 0) {if (j % 10 == 2) {sumCount++;}j /= 10;}}System.out.println(sumCount);scanner.close();}
}

与7无关的数

#include<iostream>
using namespace std;bool isRelated(int n)
{if(n % 7 == 0)  // 能被7整除return true;while(n)    // 数字上有7{if(n % 10 == 7)return true;n /= 10;}return false;
}int main()
{int n, sum = 0;cin >> n;for(int i = 1; i <= n; i++)if(!isRelated(i))   // 如果与7无关sum += i * i;cout << sum << endl;return 0;
}

def is_related(n):if n % 7 == 0:  # 能被7整除return Truewhile n > 0:    # 数字中有7if n % 10 == 7:return Truen //= 10return Falsen = int(input())
sum_of_squares = 0
for i in range(1, n + 1):if not is_related(i):  # 如果与7无关sum_of_squares += i * iprint(sum_of_squares)

import java.util.Scanner;
public class Main {public static boolean isRelated(int n) {if (n % 7 == 0) {  // 能被7整除return true;}while (n > 0) {    // 数字中有7if (n % 10 == 7) {return true;}n /= 10;}return false;}public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int n = scanner.nextInt();int sumOfSquares = 0;for (int i = 1; i <= n; i++) {if (!isRelated(i)) {  // 如果与7无关sumOfSquares += i * i;}} System.out.println(sumOfSquares);scanner.close();}
}