Compilare: main.c: In function 'main': main.c:20:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &g); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:21:29: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] for (int i=1; i<=n; i++)fscanf(fin, "%d%d", &w[i], &p[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:35:5: warning: 'i1' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d", v[i1][g]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~