Compilare: user.cpp: In function ‘int main()’: user.cpp:34:9: warning: unused variable ‘n’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:13: warning: unused variable ‘val’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:17: warning: unused variable ‘x’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:19: warning: unused variable ‘y’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:21: warning: unused variable ‘cnt’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:27: warning: unused variable ‘i’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:34:29: warning: unused variable ‘j’ [-Wunused-variable] int n,m,val,x,y,cnt=0,i,j; ^ user.cpp:35:8: warning: unused variable ‘w’ [-Wunused-variable] el w; ^