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base62 for C++
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| #include <iostream> | |
| #include <cassert> | |
| using namespace std; | |
| const string CODES = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; | |
| string toBase62(int value) { | |
| string str; | |
| do { | |
| str.insert(0, string(1, CODES[value % 62])); | |
| value /= 62; | |
| } while (value > 0); | |
| return str; | |
| } | |
| int toBase10(string value) { | |
| std::reverse(value.begin(), value.end()); | |
| int ret = 0; | |
| int count = 1; | |
| for (char& character : value) { | |
| ret += CODES.find(character) * count; | |
| count *= 62; | |
| } | |
| return ret; | |
| } | |
| int main() { | |
| assert("3bj" == toBase62(12233)); | |
| assert(12233 == toBase10("3bj")); | |
| return 0; | |
| } |
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thanks