Compilare: user.cpp: In function ‘int main()’: user.cpp:12:13: warning: unused variable ‘j’ [-Wunused-variable] int i,n,j,k,poz,elem; ^ user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:16:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^