Compilare: user.cpp: In function ‘int main()’: user.cpp:30:21: warning: unused variable ‘r’ [-Wunused-variable] int n,m,p=0,q=0,r,i,j,a,b,ncr,c,d,pc; ^ user.cpp:30:27: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int n,m,p=0,q=0,r,i,j,a,b,ncr,c,d,pc; ^ user.cpp:28:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.in","r",stdin); ^ user.cpp:29:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc3.out","w",stdout); ^ user.cpp:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:34:54: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&(v[i].a),&(v[i].b),&(v[i].r)); ^