Compilare: user.cpp: In function ‘void bordare()’: user.cpp:15:11: warning: statement has no effect [-Wunused-value] for(i==0; i<=+1; i++) ^ user.cpp: In function ‘void lee()’: user.cpp:41:14: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[ii][jj]!=-1 && a1[ii][jj]==0) ^ user.cpp: In function ‘void bordare()’: user.cpp:15:6: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i==0; i<=+1; i++) ^ user.cpp: In function ‘int main()’: user.cpp:15:6: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:14:10: note: ‘i’ was declared here int i; ^