Compilare: user.cpp: In function ‘int main()’: user.cpp:14:15: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int k,m,n,ok; ^ user.cpp:15:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(l,"%d",&k); ^ user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(l,"%d",&n); ^ user.cpp:19:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(l,"%d %d",&e[i].x,&e[i].y); ^ user.cpp:21:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(l,"%d",&m); ^ user.cpp:25:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(l,"%d %d",&p[i].x,&p[i].y); ^