Compilare: user.cpp: In function ‘int main()’: user.cpp:5:8: warning: unused variable ‘i’ [-Wunused-variable] int i,n,poz1,poz2,x,con; ^ user.cpp:8:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&n); ^ user.cpp:32:16: warning: ‘con’ may be used uninitialized in this function [-Wmaybe-uninitialized] con++; ^