題目:反轉字符串 Solution_1 如果你知道 reverse() 函數(shù)的話,可以偷個懶 AC Code_1 class Solution { public: string solve(string str) { reverse(str.begin(),str.end()); return str; } }; Solution_2 頭尾交換,實現(xiàn)反轉 AC Code_2 class Solution { public: string solve(string str) { int len = str.length();...