Eroare de compilare: user.c: In function ‘main’: user.c:27:14: error: ‘a’ undeclared (first use in this function) while(a < 2 || b > 2000000000); ^ user.c:27:14: note: each undeclared identifier is reported only once for each function it appears in user.c:27:23: error: ‘b’ undeclared (first use in this function) while(a < 2 || b > 2000000000); ^ user.c:29:5: warning: too many arguments for format [-Wformat-extra-args] fprintf(p, "%d\n", x, y, cmmdc(x,y)); ^ user.c:19:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &T); ^ user.c:25:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &x, &y); ^