Compilare: user.c:7:5: warning: second argument of ‘main’ should be ‘char **’ [-Wmain] int main(int argc, char argv[]) ^ user.c: In function ‘euclid’: user.c:32:24: warning: operation on ‘b’ may be undefined [-Wsequence-point] a = a + b - (b = a); ^ user.c: In function ‘main’: user.c:15:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &T); ^ user.c:18:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &a, &b); ^