Compilare: user.cpp: In function ‘int main()’: user.cpp:62:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2;i<drx.size();i++){ ^ user.cpp:29:18: warning: unused variable ‘stg’ [-Wunused-variable] int n, i, k, stg, j; ^ user.cpp:36:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &n); ^ user.cpp:38:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lf%lf", &v[i].x, &v[i].y); ^