Compilare: user.cpp: In function ‘int tu(int, int, int)’: user.cpp:61:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int io(int, int)’: user.cpp:71:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:81:39: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] fscanf(f,"%d%d",&c[i].a,&c[i].b); ^ user.cpp:81:39: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘long int*’ [-Wformat=]