两变量互换值得总结

1 引入辅助变量法 int a = 1; int b = 2; int c; c = a; a = b; b = c; 2 代数和法 int a = 1; int b = 2; a = a+b; b = a-b; a = a-b; 3 逻辑运算法 int a = 1; int b = 2; a=a^b; b=a^b; a = a^b; 4 运算符优先级法(适用于java, C#, C, C++) int a = 1; int b = 2; a = b + 0*(b=a);