Compilare: user.cpp: In function ‘int main()’: user.cpp:69:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < apm.size(); i++){ ^ user.cpp:49:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y, c; ^ user.cpp:49:15: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x, y, c; ^ user.cpp:49:18: warning: unused variable ‘y’ [-Wunused-variable] int i, j, x, y, c; ^ user.cpp:49:21: warning: unused variable ‘c’ [-Wunused-variable] int i, j, x, y, c; ^ user.cpp:58:21: warning: unused variable ‘m’ [-Wunused-variable] int NrMSel = 0, m, m2, r1 , r2; ^ user.cpp:58:24: warning: unused variable ‘m2’ [-Wunused-variable] int NrMSel = 0, m, m2, r1 , r2; ^