Compilare: main.c: In function 'main': main.c:10:23: warning: unused variable 'nr2' [-Wunused-variable] int n, i, r, nr1, nr2, a, b, c, d, x; ^~~ main.c:10:18: warning: unused variable 'nr1' [-Wunused-variable] int n, i, r, nr1, nr2, a, b, c, d, x; ^~~ main.c:11:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^~~~~~~~~~~~~~~~~~~~~