Compilare: user.cpp: In function ‘int main()’: user.cpp:12:23: warning: unused variable ‘m’ [-Wunused-variable] int i,j,ia,ja,k,n,m,pasi,x,c=1,c1=1,cer_a,arie=0,lastx=0,colturi=0,i1,j1; ^ user.cpp:12:54: warning: variable ‘lastx’ set but not used [-Wunused-but-set-variable] int i,j,ia,ja,k,n,m,pasi,x,c=1,c1=1,cer_a,arie=0,lastx=0,colturi=0,i1,j1; ^ user.cpp:12:62: warning: unused variable ‘colturi’ [-Wunused-variable] int i,j,ia,ja,k,n,m,pasi,x,c=1,c1=1,cer_a,arie=0,lastx=0,colturi=0,i1,j1; ^ user.cpp:10:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.in","r",stdin); ^ user.cpp:11:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zona.out","w",stdout); ^ user.cpp:13:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&i,&j,&n,&pasi); ^ user.cpp:19:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:12:41: warning: ‘cer_a’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i,j,ia,ja,k,n,m,pasi,x,c=1,c1=1,cer_a,arie=0,lastx=0,colturi=0,i1,j1; ^