Compilare: main.c: In function 'main': main.c:35:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:46:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d %d", &x, &y, &s1, &g1); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~