Eroare de compilare: user.cpp: In function ‘std::string initial(std::string)’: user.cpp:22: warning: array subscript has type ‘char’ user.cpp: In function ‘std::string transform(std::string)’: user.cpp:48: warning: array subscript has type ‘char’ user.cpp:54: warning: array subscript has type ‘char’ user.cpp:60: warning: array subscript has type ‘char’ user.cpp:67: warning: array subscript has type ‘char’ user.cpp:69: warning: array subscript has type ‘char’ user.cpp:72: warning: array subscript has type ‘char’ user.cpp:72: error: ‘ltoa’ was not declared in this scope user.cpp:73: warning: array subscript has type ‘char’ user.cpp:32: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:111: warning: array subscript has type ‘char’ user.cpp:122: warning: array subscript has type ‘char’ user.cpp:125: warning: array subscript has type ‘char’ user.cpp:128: warning: array subscript has type ‘char’