Compilare: user.cpp: In function ‘int main()’: user.cpp:21:40: warning: unused variable ‘u’ [-Wunused-variable] d=Distance(x1,Y1,x2,y2); int u=abs1(3-1); ^ user.cpp:14:9: warning: unused variable ‘q’ [-Wunused-variable] int q,n; ^ user.cpp:14:11: warning: unused variable ‘n’ [-Wunused-variable] int q,n; ^ user.cpp:15:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.in","r",stdin); ^ user.cpp:16:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri.out","w",stdout); ^ user.cpp:17:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:20:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&x1,&Y1,&r1,&x2,&y2,&r2); ^