Compilare: user.cpp: In function ‘int main()’: user.cpp:10:17: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int n,m,i,j,c,q,w,e,lin,col; ^ user.cpp:10:21: warning: unused variable ‘w’ [-Wunused-variable] int n,m,i,j,c,q,w,e,lin,col; ^ user.cpp:10:23: warning: unused variable ‘e’ [-Wunused-variable] int n,m,i,j,c,q,w,e,lin,col; ^