Compilare: user.c: In function ‘main’: user.c:56:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &a, &b, &m); ^ user.c:59:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &x, &y, &z); ^ user.c:80:19: warning: ‘augm’ may be used uninitialized in this function [-Wmaybe-uninitialized] fol[mch[x]] += augm; ^