Compilare: user.cpp: In function ‘int main()’: user.cpp:19:27: warning: unused variable ‘cate’ [-Wunused-variable] int nrcentrale,costlimita,cate=0,i,j,pp=0,s=0; ^ user.cpp:19:36: warning: unused variable ‘j’ [-Wunused-variable] int nrcentrale,costlimita,cate=0,i,j,pp=0,s=0; ^ user.cpp:19:38: warning: unused variable ‘pp’ [-Wunused-variable] int nrcentrale,costlimita,cate=0,i,j,pp=0,s=0; ^ user.cpp:16:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("energii.in","r",stdin); ^ user.cpp:17:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("energii.out","w",stdout); ^ user.cpp:21:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&nrcentrale,&costlimita); ^ user.cpp:24:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%f%f",&v[i].en,&v[i].cost); ^