Compilare: user.cpp: In function ‘int main()’: user.cpp:30:36: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘int’ [-Wformat=] if(S==n) {fprintf(g,"%lu",i); stop=0; } ^ user.cpp:16:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lu",&n); ^