Compilare: user.cpp: In function 'void convert()': user.cpp:50: warning: operation on 'i' may be undefined user.cpp: In function 'void read(int*)': user.cpp:74: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[500]' user.cpp: In function 'int main()': user.cpp:84: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[500]' user.cpp:84: warning: format '%s' expects type 'char*', but argument 4 has type 'char (*)[500]'