Compilare: user.cpp: In function ‘int main()’: user.cpp:15:12: warning: unused variable ‘h’ [-Wunused-variable] int n,l,h,x,b,e,t,i; ^ user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&l); ^ user.cpp:22:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&v[i].h,&v[i].x); ^