c++用类模板写一个工具类，可以有小数，整数，向量的加减乘除

好的，以下是一个使用类模板实现的工具类，可以进行小数、整数和向量的加减乘除运算：

#include <iostream>
#include <vector>

template <typename T>
class Calculator {
public:
    T add(T a, T b) {
        return a + b;
    }

    T subtract(T a, T b) {
        return a - b;
    }

    T multiply(T a, T b) {
        return a * b;
    }

    T divide(T a, T b) {
        return a / b;
    }

    std::vector<T> add(std::vector<T> a, std::vector<T> b) {
        std::vector<T> result;
        for (int i = 0; i < a.size(); i++) {
            result.push_back(a[i] + b[i]);
        }
        return result;
    }

    std::vector<T> subtract(std::vector<T> a, std::vector<T> b) {
        std::vector<T> result;
        for (int i = 0; i < a.size(); i++) {
            result.push_back(a[i] - b[i]);
        }
        return result;
    }

    std::vector<T> multiply(std::vector<T> a, std::vector<T> b) {
        std::vector<T> result;
        for (int i = 0; i < a.size(); i++) {
            result.push_back(a[i] * b[i]);
        }
        return result;
    }

    std::vector<T> divide(std::vector<T> a, std::vector<T> b) {
        std::vector<T> result;
        for (int i = 0; i < a.size(); i++) {
            result.push_back(a[i] / b[i]);
        }
        return result;
    }
};

int main() {
    Calculator<int> intCalc;
    std::cout << intCalc.add(1, 2) << std::endl;
    std::cout << intCalc.subtract(3, 2) << std::endl;
    std::cout << intCalc.multiply(2, 3) << std::endl;
    std::cout << intCalc.divide(6, 3) << std::endl;

    Calculator<double> doubleCalc;
    std::cout << doubleCalc.add(1.5, 2.5) << std::endl;
    std::cout << doubleCalc.subtract(3.5, 2.5) << std::endl;
    std::cout << doubleCalc.multiply(2.5, 3.5) << std::endl;
    std::cout << doubleCalc.divide(6.5, 3.5) << std::endl;

    Calculator<std::vector<int>> intVecCalc;
    std::vector<int> a = {1, 2, 3};
    std::vector<int> b = {4, 5, 6};
    std::vector<int> c = intVecCalc.add(a, b);
    for (int i = 0; i < c.size(); i++) {
        std::cout << c[i] << " ";
    }
    std::cout << std::endl;

    Calculator<std::vector<double>> doubleVecCalc;
    std::vector<double> d = {1.5, 2.5, 3.5};
    std::vector<double> e = {4.5, 5.5, 6.5};
    std::vector<double> f = doubleVecCalc.subtract(d, e);
    for (int i = 0; i < f.size(); i++) {
        std::cout << f[i] << " ";
    }
    std::cout << std::endl;

    return 0;
}

希望这个工具类能够满足您的需求！