Compilare: main.c: In function 'read_graph_file': main.c:120:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", nods, &z); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'dijkstra': main.c:43:12: warning: 'min_index' may be used uninitialized in this function [-Wmaybe-uninitialized] viz[nod_curent] = true; ^ main.c: In function 'find_min_nod': main.c:109:12: warning: 'min_index' may be used uninitialized in this function [-Wmaybe-uninitialized] return min_index; ^~~~~~~~~