各位親：
下午沒事就記錄了十進制轉換成其他任意進制演算法完整代碼實作如下，基本原理運用輾轉相除法，
1 #include<iostream> 2 #include<cstring> 3 #include<string> 4 #include<string.h> 5 #include<stdio.h> 6 #include <algorithm> 7 using namespace std; 8 9 string JinZhi10To2Str(int n) 10 { 11 int i; 12 string temp = ""; 13 string value = https://www.cnblogs.com/geziyu/p/""; 14 i = n; 15 while (i) { 16 //_itoa_s(i % 2,str,10); 17 temp = to_string(i % 2); 18 value = https://www.cnblogs.com/geziyu/p/temp + value; //倒敘拼接 19 i /= 2; 20 } 21 return value; 22 } 23 24 string JinZhi10To8Str(int n) 25 { 26 int i; 27 string value = https://www.cnblogs.com/geziyu/p/""; 28 string temp = ""; 29 i = n; 30 while (i) 31 { 32 temp = to_string(i % 8); 33 value = https://www.cnblogs.com/geziyu/p/temp + value; 34 i /= 8; 35 } 36 return value; 37 } 38 39 string JinZhi10To16Str(int n) 40 { 41 int i; 42 string value = https://www.cnblogs.com/geziyu/p/""; 43 string temp = ""; 44 i = n; 45 while (i) { 46 int m = i % 16; 47 if (m >= 10) { 48 switch (m) 49 { 50 case 10:temp = "A"; break; 51 case 11:temp = "B"; break; 52 case 12:temp = "C"; break; 53 case 13:temp = "D"; break; 54 case 14:temp = "E"; break; 55 case 15:temp = "F"; break; 56 default: 57 break; 58 } 59 value = https://www.cnblogs.com/geziyu/p/temp + value; 60 } 61 else { 62 temp = to_string(m); 63 value = https://www.cnblogs.com/geziyu/p/temp + value; 64 } 65 i /= 16; 66 } 67 return value; 68 } 69 70 string JinZhi10To32Str(int n) 71 { 72 string value; 73 string tmp; 74 75 char str[100]; 76 for (int i = 3; i >= 0; i--) 77 { 78 int a = 1; 79 switch (i) 80 { 81 case 1: a = 32; break; 82 case 2: a = 32 * 32; break; 83 case 3: a = 32 * 32 * 32; break; 84 } 85 86 tmp = ""; 87 int b = n / a; 88 if (b <= 0x0f) 89 { 90 91 _itoa_s(b, str, 16); 92 string s(&str[0], &str[strlen(str)]); 93 transform(s.begin(), s.end(), s.begin(), ::toupper);//轉換成大寫字母 94 //transform(str.begin(), str.end(), str.begin(), ::tolower); //轉換成小寫字母 95 tmp = s; 96 97 //tmp = to_string(b);//可以直接將整型轉換成字串型別包含于#include<string> 98 99 #if 0 100 tmp.format("%x", b); //mfc中格式化16進制輸出 101 #endif 102 103 } 104 else 105 { 106 // g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v 107 switch (b) 108 { 109 case 16:tmp = "G"; break; 110 case 17:tmp = "H"; break; 111 case 18:tmp = "J"; break; 112 case 19:tmp = "K"; break; 113 case 20:tmp = "L"; break; 114 case 21:tmp = "M"; break; 115 case 22:tmp = "N"; break; 116 case 23:tmp = "P"; break; 117 case 24:tmp = "R"; break; 118 case 25:tmp = "S"; break; 119 case 26:tmp = "T"; break; 120 case 27:tmp = "V"; break; 121 case 28:tmp = "W"; break; 122 case 29:tmp = "X"; break; 123 case 30:tmp = "Y"; break; 124 case 31:tmp = "Z"; break; 125 default:tmp = ""; break; 126 } 127 } 128 value += tmp; 129 n %= a; 130 } 131 return value; 132 } 133 134 string JinZhi10To32Str_1(int n) 135 { 136 int i; 137 string value = https://www.cnblogs.com/geziyu/p/""; 138 string temp = ""; 139 i = n; 140 while (i) { 141 int m = i % 32; 142 if (m >= 10) { 143 switch (m) 144 { 145 case 10:temp = "A"; break; 146 case 11:temp = "B"; break; 147 case 12:temp = "C"; break; 148 case 13:temp = "D"; break; 149 case 14:temp = "E"; break; 150 case 15:temp = "F"; break; 151 case 16:temp = "G"; break; 152 case 17:temp = "H"; break; 153 case 18:temp = "I"; break; 154 case 19:temp = "J"; break; 155 case 20:temp = "K"; break; 156 case 21:temp = "L"; break; 157 case 22:temp = "M"; break; 158 case 23:temp = "N"; break; 159 case 24:temp = "O"; break; 160 case 25:temp = "P"; break; 161 case 26:temp = "Q"; break; 162 case 27:temp = "R"; break; 163 case 28:temp = "S"; break; 164 case 29:temp = "T"; break; 165 case 30:temp = "U"; break; 166 case 31:temp = "V"; break; 167 default: 168 break; 169 } 170 value = https://www.cnblogs.com/geziyu/p/temp + value; 171 } 172 else { 173 temp = to_string(m); 174 value = https://www.cnblogs.com/geziyu/p/temp + value; 175 } 176 i /= 32; 177 } 178 return value; 179 } 180 181 int main() 182 { 183 int m,temp; 184 while (true) { 185 cout << endl << " * * * * * * * * 進制轉換 * * * * * * * *" << endl; 186 cout << " * *" << endl; 187 cout << " * 1、10進制轉2進制 *" << endl; 188 cout << " * *" << endl; 189 cout << " * 2、10進制轉8進制 *" << endl; 190 cout << " * *" << endl; 191 cout << " * 3、10進制轉16進制 *" << endl; 192 cout << " * *" << endl; 193 cout << " * 4、10進制轉32進制(i,o,u,v除外) *" << endl; 194 cout << " * *" << endl; 195 cout << " * 5、10進制轉32進制 *" << endl; 196 cout << " * *" << endl; 197 cout << " * * * * * * * * * * * * * * * * * * * **" << endl << endl; 198 cout << " 請選擇："; 199 cin >> m; 200 switch (m) 201 { 202 case 1: 203 cout << "十進制數："; 204 cin >> temp; 205 cout << temp << "轉換成2進制：" << JinZhi10To2Str(temp) << endl << endl; 206 break; 207 case 2: 208 cout << "十進制數："; 209 cin >> temp; 210 cout << temp << "轉換成8進制：" << JinZhi10To8Str(temp) << endl << endl; 211 break; 212 case 3: 213 cout << "十進制數:"; 214 cin >> temp; 215 cout << temp << "轉成16進制：" << JinZhi10To16Str(temp) << endl << endl; 216 break; 217 case 4: 218 cout << "十進制數："; 219 cin >> temp; 220 cout << temp << "轉換成32進制：" << JinZhi10To32Str(temp) << endl << endl; 221 break; 222 case 5: 223 cout << "十進制數："; 224 cin >> temp; 225 cout << temp << "轉換成32進制：" << JinZhi10To32Str_1(temp) << endl << endl; 226 break; 227 default: 228 cout << "只能在1-6中選擇" << endl; 229 break; 230 } 231 } 232 } 233 234 235 #if 0 236 237 #include<cstdio> 238 #include<cstdlib> 239 int main() 240 { 241 int num = 32; 242 char str[100]; 243 _itoa_s(num, str, 32); //c++中一般用_itoa，用itoa也行, 244 printf("%s\n", str); 245 return 0; 246 } 247 248 249 #include<iostream> 250 using namespace std; 251 void main() 252 { 253 int n, i, j = 0; 254 int a[1000]; 255 cin >> n; 256 i = n; 257 while (i) 258 { 259 a[j] = i % 2; 260 i /= 2; 261 j++; 262 263 } 264 for (i = j - 1; i >= 0; i--) 265 cout << a[i]; 266 cout << endl; 267 } 268 #endif
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標籤：C++
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