STL中string的扩展类string_ex,给出许多扩展的操作字符串的非常使用的成员函数-STL string of extensions string_ex given many strings to expand the operation of the very use of the function

Package consists of 3 files. First, to calculate number of deletions required in a string so that no two consecutive characters are same, where string consists of only 2 characers with repetition. Second to detect if a string contains all english alp