Compilare: user.cpp: In function ‘int main()’: user.cpp:20:10: warning: unused variable ‘j’ [-Wunused-variable] int i , j ; ^ user.cpp:73:7: warning: ‘value’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( value == (a-1) ) ^ user.cpp:89:26: warning: ‘nowcol’ may be used uninitialized in this function [-Wmaybe-uninitialized] col[nowcol].erase(it3); ^