Compilare: user.cpp: In function ‘int main()’: user.cpp:75:30: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fo,"%d ", b-a+1-c); ^ user.cpp:64:14: warning: unused variable ‘d’ [-Wunused-variable] int c=0, d=0; ^ user.cpp:52:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld%lld", &a, &b); ^