Compilare: user.cpp: In function ‘void lee()’: user.cpp:45:23: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(nl == l2 && nc == c2 ) ^ user.cpp:38:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(nl == l1 && nc == c1) ^ user.cpp:69:42: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(mat[nl][nc] <= k1 && mat[nl][nc] >=k2 || mat[nl][nc] ==0) ^