Compilare: user.cpp: In function ‘void lee()’: user.cpp:21:17: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (l1>=1 &&l1<=n&c1>=1&&c1<=n&&b[l1][c1]<a[l1][c1]+b[v.l][v.c]&&v.pas<=k) ^ user.cpp:31:17: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (l1>=1 &&l1<=n&c1>=1&&c1<=n&&b[l1][c1]<a[l1][c1]+b[v.l][v.c]&&v.pas<=k) ^ user.cpp:10:7: warning: unused variable ‘j’ [-Wunused-variable] int p,j,i,u,l1,c1; ^ user.cpp:10:9: warning: unused variable ‘i’ [-Wunused-variable] int p,j,i,u,l1,c1; ^