蓝桥杯【基础训练】部分

BASIC-1 闰年判断

/*
基础训练：BASIC-1 闰年判断 条件判断
*/

#include<iostream>
using namespace std;
 int main()
 {
     int year;
     cin>>year;
     while(year<=2050&&year>=1990)
     {
         if(year%4==0)
             if(year%100==0)
                    if(year%400==0)
                       {cout<<"yes";break;}
                 else
                       {cout<<"no";break;}
             else
                 {cout<<"yes";break;}
        else
         {cout<<"no"; break;}
         cin>>year;
     }
     return 0;
 }

BASIC-2 01串

/*
基础训练： BASIC-2  01字串    循环 

*/

#include <stdio.h>

int main(void)
{
    int a, b, c, d, e; 
    
    for(a = 0; a < 2; a++)
        for(b = 0; b < 2; b++)
            for(c = 0; c < 2; c++)
                for(d = 0; d < 2; d++)
                    for(e = 0; e < 2; e++)
                    {
                        printf("%d%d%d%d%d
", a, b, c, d, e);
                    }
    return 0;
}

BASIC-3  字母图形

/*
BASIC-3    字母图形    循环 字符串

字母的序号与两个坐标的差的绝对值有关,26个字母对应的序号分别是0到25. 
*/

#include<iostream>
#include<math.h>
using namespace std;

char toStr(int i, int j, char str[26]){
    char tostr;
    int num, k;
    num = abs(i - j);
    return str[num];

}

int main(void){
    int n, m, i, j;    //n >= 1 , m <= 26
    
    char str[26] = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W',X','Y','Z'};
    
    int a[n][m];
    
    cin >> n >> m;
    
    for(i = 0; i < n; i++){
        for(j = 0 ; j < m; j++){
            printf("%c", toStr(i, j, str));
        }
        printf("
");
    }
    
    return 0;
}

BASIC-4    数列特征

/*
BASIC-4    数列特征    循环 最大值 最小值 累加
*/
#include <stdio.h>
#define MaxSize 10000

main()
{
    int n;
    int sum=0,min=MaxSize,max=-MaxSize;
    
    scanf("%d",&n);
    while(n--)
    {
        int temp,st;
        scanf("%d",&temp);
        
        if(temp>max)
        {
            max=temp;
        }
        if(temp<min)
        {
            min=temp;
        }
        sum+=temp;
    }
    printf("%d
%d
%d
",max,min,sum);
    
    return 0;
}

BASIC-5    查找整数    循环 判断

/*
BASIC-5    查找整数    循环 判断
*/


#include<iostream>
using namespace std;

int main(void){
    int n, b, i, flag = -1;
    unsigned int a[1000];
    
    cin >> n;
    for(i = 0; i < n; i++){
        cin >> a[i];
    }
    
    cin >> b;
    for(i = 0; i < n; i++){
        if(b == a[i]){
            flag = 0;
            cout<<(i + 1);
            break;
        }
    }
    if(flag){
        cout << flag;
    }
    return 0;
} 

BASIC-6    杨辉三角形

/*
BASIC-6    杨辉三角形    基础练习 二维数组
*/

#include<iostream>
#include<iomanip>
using namespace std;

int main(void){
    int num, i, j;  //num <= 34
    int a[100][100];    //将杨辉三角存储与二维数组 
    
    cin >> num;
    if(num >= 1 && num <= 34){
        //初始化 
        for(i = 0; i < num; i++){
            //杨辉三角的每行的第一位和最后一位为一 
            a[i][0] = a[i][i] = 1;
            
            for(j = 0; j < i; j++){
                //除第一，二行，其余行是前一行与之对应的计算和 
                a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
            }
        }
        
        //输出 
        for(i = 0; i < num; i++){
            for(j = 0; j <= i; j++){
                cout << a[i][j] << " ";    //每行的每个数之间空一格
//                cout << std::left << setw(5) << a[i][j]; //这种方法不和题意，且显示效果不必上个输出好 
            }
            cout << endl;
        }
    }
    
    return 0;
} 

BASIC-7    特殊的数字

/*
BASIC-7    特殊的数字    循环 判断 数位
*/

#include<iostream>
using namespace std;

int main(void){
    int num, a, b, c;
    for(num = 100; num <= 999; num++){
        a = num % 10;
        b = num % 100 / 10;
        c = num / 100;
        if(a*a*a + b*b*b + c*c*c == num){
            cout << num << endl;
        }
    }
    return 0;
} 

BASIC-8    回文数

/*
BASIC-8    回文数    循环 判断 回文数
*/


#include<iostream>
using namespace std;

int main(void){
    unsigned int num, a, b, c, d;
    
    for(num = 1000; num <= 9999; num++){
        a = num % 10;    //个位 
        b = num % 100 / 10;    //十位 
        c = num % 1000 / 100;    //百位 
        d = num / 1000;    //千位 
        if(a == d && b == c){
//            cout << a << b << c << d << " ";

            cout << num << endl;
        }
    }
    return 0;
}

BASIC-9    特殊回文数 

/*
BASIC-9    特殊回文数    回文数 循环 条件语句
*/

#include<iostream>
using namespace std;

int main(void){
    long int numb;
    int a, b, c, d, e, f, num;
    
    cin >> num;
    
    for(numb = 10000; numb <= 999999; numb++){
        if(numb <= 99999){
            a = numb % 10;
            b = numb % 100 / 10;
            c = numb % 1000 / 100;
            d = numb % 10000 / 1000;
            e = numb / 10000;
            if((num == a + b + c + d + e) && (a == e) && (b == d)){
                cout << numb << endl;
            }
        }else{
            a = numb % 10;
            b = numb % 100 / 10;
            c = numb % 1000 / 100;
            d = numb % 10000 / 1000;
            e = numb % 100000 / 10000;
            f = numb / 100000;
            if((num == a + b + c + d + e + f) && (a == f) && (b == e) && (c == d)){
                cout << numb << endl;
            } 
        }
    }
    
    return 0;
}

BASIC-10    十进制转十六进制

/*
BASIC-10    十进制转十六进制    循环 整除 求余 判断
*/ 

#include <iostream>
#include <cstring>
using namespace std;

string decimalToHexadecimal(int num);

string decimalToHexadecimal(int num){
    int ans,k;k=0;
    string result="";
    if(num == 0){
        cout << "0" << endl; 
        return result += "0";
        }
    while(num>0){
      ans = num % 16;
      if(ans <= 9 && ans >= 0){
          result[k++] = ans + 48;
            }else if(ans >= 10 && ans < 16){
                result[k++] = ans + 55;
            }
      num = num / 16;
    }
    for(int i = k-1; i >= 0; i--)
      cout << result[i];
    cout << endl;
    return result;
}

int main(void)
{
    int num;
    while(cin >> num)
    {
            decimalToHexadecimal(num);
    }
    return 0;
}

BASIC-12 十六进制转八进制 进制转换 字符 循环
（这道题不是我ac的，是这个人！）

/*BASIC-12 十六进制转八进制 进制转换 字符 循环*/

#include <iostream>
#include <string>
using namespace std;
int arr[10000001];

int main()
{
    int n,len_str,i,j;
    string str,str2;
    cin>>n;
    while(n--)
    {
        cin>>str;
        len_str=str.length();
        str2="";

        // 十六进制转换为二进制
        for(i=0;i<len_str;++i)
        {
            switch(str[i])
            {
            case '0':str2+="0000";break;
            case '1':str2+="0001";break;
            case '2':str2+="0010";break;
            case '3':str2+="0011";break;
            case '4':str2+="0100";break;
            case '5':str2+="0101";break;
            case '6':str2+="0110";break;
            case '7':str2+="0111";break;
            case '8':str2+="1000";break;
            case '9':str2+="1001";break;
            case 'A':str2+="1010";break;
            case 'B':str2+="1011";break;
            case 'C':str2+="1100";break;
            case 'D':str2+="1101";break;
            case 'E':str2+="1110";break;
            case 'F':str2+="1111";break;
            default:break;
            }
        }
        
        // 修正位数
        if(len_str%3==1)    str2="00"+str2;
        
        else if(len_str%3==2)    str2="0"+str2;

        
        len_str=str2.length();
        // 二进制转换八进制
        j=0;
        for(i=0;i<=len_str-2;i+=3)
        {
            arr[j]=(str2[i]-'0')*4+(str2[i+1]-'0')*2+(str2[i+2]-'0');
            ++j;
        }

        for(i=0;i<j;++i)
        {
            if(i==0 && arr[i]==0)    continue;
            cout<<arr[i];
        }
        cout<<endl;

    }
    return 0;

}

 

BASIC-13    数列排序

/*
BASIC-13    数列排序    数组 排序

*/

#include<iostream>
using namespace std;

void quickSort(int num[], int low, int hight);
int quickPass(int num[], int low, int hight);

void quickSort(int num[], int low, int hight){
    int pos;
    if(low < hight){
        pos = quickPass(num, low, hight);
        quickSort(num, low, pos - 1);
        quickSort(num, pos + 1, hight);
    }
}

int quickPass(int num[], int low, int hight){
    int x;
    x = num[low];
    while(low < hight){
        while(low < hight && num[hight] >= x){
            hight--;
        }
        if(low < hight){
            num[low] = num[hight];
            low++;
        }
        while(low < hight && num[low] <= x){
            low++;
        }
        if(low < hight){
            num[hight] = num[low];
            hight--;
        }
    }
    num[low] = x;
    return low;
}

int main(void){
    unsigned int n;
    int num[10000], i;
    
    cin >> n;
    for(i = 0; i < n; i++){
        cin >> num[i];
    }
    
    quickSort(num, 0, i - 1);
    
    for(i = 0; i < n; i++){
        cout << num[i] << " ";
    }
    return 0;
}