Compilare: user.cpp: In function ‘int cauta(copac)’: user.cpp:24:9: warning: unused variable ‘k’ [-Wunused-variable] int k,i,p,ok1=1,st,dr; ^ user.cpp:24:11: warning: unused variable ‘i’ [-Wunused-variable] int k,i,p,ok1=1,st,dr; ^ user.cpp:24:15: warning: unused variable ‘ok1’ [-Wunused-variable] int k,i,p,ok1=1,st,dr; ^ user.cpp:38:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana2.in","r",stdin); ^ user.cpp:43:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cabana2.out","w",stdout); ^ user.cpp:44:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&x); ^ user.cpp:47:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&f[k].x,&f[k].m); ^