Compilare: user.c: In function ‘main’: user.c:42:16: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long int’ [-Wformat=] printf("n=%d",n); ^ user.c:45:18: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(fo,"%d",n); ^ user.c:39:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d",&p); ^~~~~~~~~~~~~~~~~~