/in/ex4.c:1:19: warning: extra tokens at end of #include directive
 #include <stdio.h>;
                   ^
/in/ex4.c:2:18: warning: extra tokens at end of #include directive
 #include <time.h>;
                  ^
/in/ex4.c: In function 'main':
/in/ex4.c:8:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'time_t * {aka long int *}' [-Wformat=]
     scanf("%d",&rawtime);
             ^