Eroare de compilare: user.cpp: In function ‘std::string initial(std::string)’: user.cpp:24: warning: array subscript has type ‘char’ user.cpp: In function ‘std::string transform(std::string)’: user.cpp:50: warning: array subscript has type ‘char’ user.cpp:56: warning: array subscript has type ‘char’ user.cpp:62: warning: array subscript has type ‘char’ user.cpp:69: warning: array subscript has type ‘char’ user.cpp:71: warning: array subscript has type ‘char’ user.cpp:74: warning: array subscript has type ‘char’ user.cpp:74: error: ‘ltoa’ was not declared in this scope user.cpp:75: warning: array subscript has type ‘char’ user.cpp:34: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:121: warning: array subscript has type ‘char’ user.cpp:132: warning: array subscript has type ‘char’ user.cpp:135: warning: array subscript has type ‘char’ user.cpp:137: warning: array subscript has type ‘char’ user.cpp:138: warning: array subscript has type ‘char’