Compilare: user.cpp: In function ‘void afis(int, int)’: user.cpp:16:5: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void bkt(int, int)’: user.cpp:29:5: warning: unused variable ‘j’ [-Wunused-variable] int j,i; ^ user.cpp: In function ‘void bkt2(int)’: user.cpp:49:5: warning: unused variable ‘j’ [-Wunused-variable] int j,i; ^ user.cpp: In function ‘int main()’: user.cpp:64:18: warning: operation on ‘m[a][b]’ may be undefined [-Wsequence-point] m[a][b]=m[a][b]=1; ^