Compilare: user.cpp: In function ‘int main()’: user.cpp:29:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d%d" ,&n,&x,&y,&z); ^ user.cpp:31:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&v[i]); ^ user.cpp:56:38: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%d %d" ,poz,poz+rez-1); ^