Compilare: user.c: In function ‘main’: user.c:118:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] if(first[1] && first[1]->right==NULL) {fprintf(g,"%d",first[1]->value);return -1;} ^ user.c:105:11: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int n,a,x,*v; ^ user.c:110:30: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for(i=0;i<n;i++) { fscanf(f,"%d",&x); fgetc(f); v[i]=x; } ^