Compilare: user.cpp: In function ‘void ve(int, int)’: user.cpp:38:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(lnou>=1&&lnou<=n&&cnou<=m&&cnou>=1) ^ user.cpp:31:13: warning: unused variable ‘ln’ [-Wunused-variable] int k=0,ln=0,cn=0; ^ user.cpp:31:18: warning: unused variable ‘cn’ [-Wunused-variable] int k=0,ln=0,cn=0; ^ user.cpp: In function ‘int main()’: user.cpp:167:13: warning: unused variable ‘vf’ [-Wunused-variable] int vf=0; ^