c++进制转换算法怎么实现

C++中可以使用以下算法来实现进制转换：

#include <iostream>#include <string>std::string decToBase(int num, int base) {    std::string result = "";        while (num > 0) {        int rem = num % base;        result = (char)(rem < 10 ? rem + '0' : rem + 'A' - 10) + result;        num /= base;    }        return result;}int main() {    int num = 123;    int base = 16;    std::string result = decToBase(num, base);    std::cout << result << std::endl;    return 0;}

#include <iostream>#include <string>int baseToDec(const std::string& num, int base) {    int result = 0;    int power = 1;    for (int i = num.length() - 1; i >= 0; i--) {        int digit = (num[i] >= '0' && num[i] <= '9') ? (num[i] - '0') : (num[i] - 'A' + 10);        result += digit * power;        power *= base;    }    return result;}int main() {    std::string num = "7B";    int base = 16;    int result = baseToDec(num, base);    std::cout << result << std::endl;    return 0;}

以上示例分别实现了十进制转其他进制和其他进制转十进制的算法，你可以根据实际需求，选择合适的算法来进行进制转换。