cpp: 九九乘法表显示

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

// CardinalDirection.h : //练习案例：九九乘法表位置  CardinalDirection //案例描述：九九乘法表位置 // //2023年4月5日 涂聚文 Geovin Du edit. //       #pragma once #ifndef CARDINALDIRECTION_H #define CARDINALDIRECTION_H   #include <iostream> #include<string.h> #include<math.h>   using namespace std;   /**  * @brief  * \author geovindu.  * \date 20230-4-10  */ namespace geovindu {     /**      * @brief 位置枚举类型      * .      */     enum CardinalDirection     {         /**          * @brief 左上角          */         topLeft,         /**          * @brief 右上角          */         topRight,         /**          * @brief 左下角          */         bottomLeft,         /**          * @brief 右下角          */         bottomRight       };     }         #endif

　　

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

// MultiplicationTables.h : //练习案例：九九乘法表  MultiplicationTables //案例描述：九九乘法表 // //2023年4月5日 涂聚文 Geovin Du edit. //   #pragma once #ifndef MULTIPLLCATIONTABLES_H #define MULTIPLLCATIONTABLES_H   #include <iostream> #include<string.h> #include<math.h> #include "CardinalDirection.h"     using namespace std;   /**  * @brief  * \author geovindu.  * \date 20230-4-10  */ namespace geovindu {     /**      * @brief 九九乘法表显示.      */     class MultiplicationTables     {     private:               public:           /**          * @brief 九九乘法表显示.          *          * \param cardinalDirection          * \return          */         string getString(CardinalDirection cardinalDirection);         };   }         #endif

　　

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187

// MultiplicationTables.cpp : //练习案例：九九乘法表  MultiplicationTables //案例描述：九九乘法表 // //2023年4月5日 涂聚文 Geovin Du edit. //     #include "MultiplicationTables.h" #include <iostream> #include <string>   using namespace std;   /**  * @brief  * \author geovindu.  * \date 20230-4-10  */ namespace geovindu {         /**      * @brief 九九乘法表显示.      *      * \param cardinalDirection      * \return      */     string MultiplicationTables::getString(CardinalDirection cardinalDirection)     {         string str = "";         //stringstream dustring;           switch (cardinalDirection)         {                 case bottomLeft:                     //System.out.println("左下角");                     /*1*/                     int i, j;                     for (i = 1; i < 10; i++)                     {                         for (j = 1; j <= i; j++)                         {                             str=str+std::to_string(j) + "*" + std::to_string(i) + "=" + std::to_string(i * j);                           }                         str = str + "\n";                     }                     /*2                  for (int i = 1; i < 10; i++) {                     for (int j = 1; j <= i; j++) {                         //System.out.print(j+"*"+i+"="+i*j+"\t");                          str = str + "" + std::to_string(j) + "*" + std::to_string(i) + "="  + std::to_string(i * j);                             // printf("%d*%d=%2d\t", j, i, i * j);                                        //str = str + s;                                           str = str + "\t";                         // printf("\t\t");                         // str.append(ss);                                      }                  str = str + "\t\n";                 // printf("\t\n");                 //System.out.println();                                  } */             break;         case bottomRight:             //System.out.println("右下角"); //1*1=1             /*1             int i, j;             for (i = 1; i < 10; i++)             {                   for (j = 1; j < 10 - i; j++)                 {                     str = str + "\t";                 }                 for (j = 1; j <= i; j++)                 {                     str=str+ std::to_string(j) + "*" + std::to_string(i) + "=" + std::to_string(i * j) + "\t";                 }                 str = str + "\n";               }             */             /*2*/             for (int i = 1; i < 10; i++) {                 for (int j = 9; j >= 1; j--) {                    /* if (i == 1 && j == 1)                    {                         str = str + "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";                         str = str + std::to_string(j) + "*" + std::to_string(i) + "=" + std::to_string(i * j) + "\t";                     }                     else                     */                     if (j >i) {                         //System.out.print("");                         str = str + "\t";                                            }                     else {                         //System.out.print(j+"*"+i+"="+i*j+"\t");                                str = str + std::to_string(j) + "*" + std::to_string(i) + "=" + std::to_string(i * j) + "\t";                                              }                 }                 str = str + "\t\n";                 //System.out.println();                // cout << endl;             }                           break;         case topLeft:             //System.out.println("左上角");  //1*1=1             /*1*/             int i, int j;             for (i = 1; i < 10; i++)             {                 for (j = 1; j < 10; j++)                 {                     if (j >= i) {                         str=str+ str = str + std::to_string(j) + " * " + std::to_string(i) + " = " + std::to_string(i * j) + "\t";                     }                 }                 str = str + "\n";             }             /*2             for (int i = 9; i > 0; i--) {                 for (int j = 1; j <= i; j++) {                     // System.out.print(j+"*"+i+"="+i*j+"\t");                     str = str + std::to_string(j) + " * "  + std::to_string(i) +" = " + std::to_string(i * j) + "\t";                                    }                 str = str + "\t\n";                // System.out.println();                // cout << endl;             }*/             break;         case topRight:             //System.out.println("右上角");             /** 1 */             int i, j;             for (i = 1; i < 10; i++)             {                 for (j = 1; j < 10; j++)                 {                     if (j < i)                     {                         str = str + "\t";                     }                     else                     {                         str=str+ str = str + std::to_string(j) + "*" + std::to_string(i) + "=" + std::to_string(i * j) + "\t";                     }                 }                 str = str + "\n";             }               /*2                           for (int i = 9; i >= 1; i--) {                 for (int j = 9; j >= 1; j--) {                     if (j <= i) {                         //System.out.print(j+"*"+i+"="+i*j+"\t");                         str = str + std::to_string(j) + "*"  + std::to_string(i) + "=" + std::to_string(i * j)+ "\t";                                             }                     else {                         str = str + "\t";                         //System.out.print("\t\t");                     }                 }                 str = str + "\t\n";                 //System.out.println();                // cout << endl;             }             */             break;         default:             str = "";             break;           }           return  str;     }   }

　　

 

?

1 2 3 4 5 6 7 8 9 10 11 12

/**  * @brief 九九乘法表显示.  *  */ void Geovin::DisplayMultiplicationTables() {     MultiplicationTables table;     CardinalDirection cd;     cout << table.getString(topLeft) << endl; //bottomRight //topRight //bottomLeft     }

　　

调用：

?

1 2	//九九乘法表显示. geovin.DisplayMultiplicationTables();