Compilare: user.cpp: In function ‘int main()’: user.cpp:7:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:9:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^ user.cpp:10:9: warning: ‘elem’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x==elem) ^