Compilare: user.cpp: In function ‘int main()’: user.cpp:66:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &w, &n, &k); ^ user.cpp:69:90: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%d", &a[i].x, &a[i].y, &b[i].x, &b[i].y, &c[i].x, &c[i].y); ^