Compilare: main.c: In function 'read_graph': main.c:9:9: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'graph * {aka struct <anonymous> *}' [-Wformat=] scanf("%d %d", g, &m); ^ main.c: In function 'read_graph_file': main.c:23:5: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.c: In function 'read_graph': main.c:9:1: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", g, &m); ^~~~~~~~~~~~~~~~~~~~~ main.c:16:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &v, &w); ^~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'read_graph_file': main.c:22:1: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d %d", &g->n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:30:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pf, "%d %d", &v, &w); ^~~~~~~~~~~~~~~~~~~~~~~~~~~