Compilare: user.cpp: In function ‘void sorteaza()’: user.cpp:68:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<a[xx].size(); i++) ^ user.cpp: In function ‘void det_inc(int)’: user.cpp:89:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<st[xx].size(); j++) ^ user.cpp: In function ‘void det_sf(int)’: user.cpp:97:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<s[xx].size(); i++) ^ user.cpp: In function ‘void rezolva(int)’: user.cpp:105:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<s[x].size(); i++) ^ user.cpp:104:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘void afisare()’: user.cpp:122:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^