Compilare: main.c: In function 'read_graphVertex': main.c:31:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &dim1, &dim2); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:36:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &nod1, &nod2); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~