Compilare: user.cpp: In function ‘int main()’: user.cpp:41:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d%d",&k,&n); ^ user.cpp:42:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (int i=1;i<=n;++i) fscanf (f,"%d",&v[i]); ^ user.cpp: In function ‘int bsearch(int, int)’: user.cpp:36:12: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] return s; ^