Compilare: main.c: In function 'main': main.c:278:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile,"%d %d", &nodes, &edges); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:282:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(pFile, "%d %d %d", &x[i], &y[i], &cost); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~