Compilare: main.c: In function 'main': main.c:6:17: warning: variable 'dst' set but not used [-Wunused-but-set-variable] FILE *src, *dst; ^~~ main.c:6:11: warning: variable 'src' set but not used [-Wunused-but-set-variable] FILE *src, *dst; ^~~ main.c:12:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a); ^~~~~~~~~~~~~~~ main.c:13:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b); ^~~~~~~~~~~~~~~