Compilare: user.cpp: In function ‘int main()’: user.cpp:25:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "text.in" , "r" , stdin ) ; ^ user.cpp:26:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "text.out" , "w" , stdout ) ; ^ user.cpp: In function ‘void solve()’: user.cpp:15:33: warning: ‘ant’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( not isalpha(ant) ) ^