Compilare: user.c: In function ‘main’: user.c:37:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.c:40:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ user.c:66:10: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%d %d %d", a, b + 1, c + 1); ^ user.c:66:10: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized]