摘要：1.swap(a, b)三种方式: 1.临时变量 2. a = a + b; b = a – b; a = a – b; 可能会导致数据溢出 3.a ^ = b; b ^= a; a ^= b; 两个字符串的交换void swap(char *& a, char *&b){ char *tmp; tmp = a; a = b; b = tmp;}void swap(char **a, char... 阅读全文