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  • C/C++ 交换两个数,不使用第三个变量, 函数模板来实现

    #include <iostream>
    
    template<typename T>
    void exchangeTwoNumber(T &t1, T &t2);

    void test();
    int main() { int a = 10, b = 20; double q = 10.1, w = 20.2; char z = 'z', x = 'x'; std::cout << "交换前的 a = " << a << ", b = " << b << std::endl; std::cout << "交换前的 q = " << q << ", w = " << w << std::endl; std::cout << "交换前的 z = " << z << ", x = " << x << std::endl; exchangeTwoNumber(a, b); exchangeTwoNumber(q, w); exchangeTwoNumber(z, x); test(); std::cout << std::endl; std::cout << std::endl; std::cout << "交换后的 a = " << a << ", b = " << b << std::endl; std::cout << "交换后的 q = " << q << ", w = " << w << std::endl; std::cout << "交换后的 z = " << z << ", z = " << x << std::endl; } template<typename T> void exchangeTwoNumber(T &t1, T &t2) //通用的函数模板 { t1 = t1 + t2; t2 = t1 - t2; t1 = t1 - t2; } void test() //异或的方式,变形成函数模板,编译不通过 { int a = 1, b = 2; a ^= b; b ^= a; a ^= b; std::cout << "...a=" << a << ", b=" << b << std::endl; }
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  • 原文地址:https://www.cnblogs.com/azbane/p/11261698.html
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