Compilare: user.cpp: In function ‘int main()’: user.cpp:72:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[i]!=0) ^ user.cpp:63:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:65:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^