Compilare: user.cpp: In function ‘void bordare()’: user.cpp:9:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void drum1(int, int)’: user.cpp:49:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( i>0 && j>0 && (i-1>0 || j-1>0)) ^ user.cpp: In function ‘void drum2(int, int)’: user.cpp:59:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if( i>0 && j>0 && (i-1>0 || j-1>0)) ^