Compilare: user.cpp: In function ‘int main()’: user.cpp:21:30: warning: operation on ‘nr’ may be undefined [-Wsequence-point] v[++nr]=v[nr-1]+a; ^ user.cpp:36:21: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(g,"%d",s); ^ user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:18:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a); ^