Compilare: main.c: In function 'bfs_pointers': main.c:52:6: warning: unused variable 'ok' [-Wunused-variable] int ok = 0; ^~ main.c: In function 'main': main.c:109:6: warning: unused variable 'grade' [-Wunused-variable] int grade = 0; ^~~~~ main.c: In function 'readGraphVertex': main.c:79:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%i%i%i", &(graph.numNodes), &(graph.numEdges), &n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:91:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%i%i", &x, &y); ^~~~~~~~~~~~~~~~~~~~~~~~~