Compilare: user.cpp: In function ‘int main()’: user.cpp:30:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&n,&m,&q,&p); ^ user.cpp:32:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d%d",&v[i].x,&v[i].y,&v[i].tip,&v[i].grad); ^