lucky_fruits

摘要： //通过第三变量实现 int a = 1; int b = 2; int c = a; int a = b; int b = c; //通过表达式实现 int a = 1; int b = 2; int a = a + b - (b = a) //通过+-计算实现 int a = 1; int b 阅读全文