Compilare: user.cpp: In function ‘int main()’: user.cpp:18:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&n); ^ user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d" ,&v[i]); ^ user.cpp:14:13: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] int i,n,l; ^