Compilare: user.cpp: In function ‘int main()’: user.cpp:33:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&X); ^ user.cpp:35:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&v[i]); ^ user.cpp: In function ‘int Search(int)’: user.cpp:13:23: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int lw=1,hi=N,mid,last; ^ user.cpp: In function ‘int main()’: user.cpp:40:31: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] int x=Search(v[i]+X)-i; ^