Compilare: user.cpp: In function ‘int dist(int, int, int, int)’: user.cpp:12:54: warning: statement has no effect [-Wunused-value] int dist(int xa,int xb,int ya,int yb){(xb-xa)*(xb-xa)+(yb-ya)*(yb-ya);} ^ user.cpp:12:71: warning: no return statement in function returning non-void [-Wreturn-type] int dist(int xa,int xb,int ya,int yb){(xb-xa)*(xb-xa)+(yb-ya)*(yb-ya);} ^ user.cpp: In function ‘int main()’: user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuiburi.in","r",stdin); ^ user.cpp:25:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuiburi.out","w",stdout); ^ user.cpp:27:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:31:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t[i]); ^ user.cpp:32:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] if(t[i]) scanf("%d%d%d",&x[i],&y[i],&r[i]); ^ user.cpp:33:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] else scanf("%d%d%d%d",&x[i],&y[i],&xx[i],&yy[i]); ^