Compilare: user.cpp: In function ‘int main()’: user.cpp:61:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<drx.size();i++){ ^ user.cpp:31:21: warning: variable ‘cant’ set but not used [-Wunused-but-set-variable] int n, i, k, j, cant; ^ user.cpp:38:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &n); ^ user.cpp:40:43: 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); ^