Compilare: user.cpp: In function ‘int main()’: user.cpp:78:32: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fout,"%d" ,ans2-ans1); ^ user.cpp:31:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d" ,&a,&b); ^ user.cpp: In function ‘long long int cauta(int)’: user.cpp:16:24: warning: ‘ans’ may be used uninitialized in this function [-Wmaybe-uninitialized] ans=ans+sum; ^ user.cpp: In function ‘int main()’: user.cpp:27:14: warning: ‘n’ may be used uninitialized in this function [-Wmaybe-uninitialized] int a,b,i,n,j,p10,aux; ^