Compilare: user.cpp: In function ‘void lee(poz)’: user.cpp:25:18: warning: unused variable ‘f’ [-Wunused-variable] int i, u, p, f; ^ user.cpp: In function ‘int main()’: user.cpp:113:31: warning: ‘ju.poz::col’ may be used uninitialized in this function [-Wmaybe-uninitialized] int tmp = d[ju.lin][ju.col]-1; ~~~~~~~~~~~~~~~~^ user.cpp:113:31: warning: ‘ju.poz::lin’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:97:9: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( c != '\n' ) ^~