Compilare: user.cpp: In function ‘int main()’: user.cpp:9:27: warning: unused variable ‘st’ [-Wunused-variable] int n,i,elem,psf,pinc,st,pun; ^ user.cpp:10:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:12:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^