Compilare: user.cpp: In function ‘int main()’: user.cpp:42: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[6]’ user.cpp:47: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[102]’ user.cpp:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:47: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int convert(int, int)’: user.cpp:36: warning: control reaches end of non-void function