Compilare: user.cpp: In function ‘int main()’: user.cpp:61:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < V.size(); j++) ^ user.cpp:33:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:35:74: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &v[i].Origin.x, &v[i].Origin.y, &v[i].radius); ^