Compilare: user.cpp: In function ‘int main()’: user.cpp:39:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,x,nv,st,dr,lm; ^ user.cpp:39:17: warning: unused variable ‘x’ [-Wunused-variable] int n,m,i,j,x,nv,st,dr,lm; ^ user.cpp:39:19: warning: unused variable ‘nv’ [-Wunused-variable] int n,m,i,j,x,nv,st,dr,lm; ^ user.cpp:37:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar2.in","r",stdin); ^ user.cpp:38:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("numar2.out","w",stdout); ^ user.cpp:40:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:43:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^