代码如下: #include <iostream> using namespace std; int main() { char ch; char s_letter[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}; char b_letter[26]={'A','B','C','D','E','F','G','H','I',…