now properly works, big thanks to @sulami

c/typeprint.c

@@ -1,4 +1,5 @@
 #include <time.h>
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -13,23 +14,24 @@ process(char *name)
         ts.tv_sec = 0;
         ts.tv_nsec = 10 * 1000000;
 
-        if (file == 0){
-            fprintf(stderr, "[err] you either gave me an invalid file, or no file at all\n");
-            return -1;
+        if (file == 0) {
+            fprintf(stderr, "[err] no such file or directory\n");
+            return ENOENT;
         }
 
         int x;
         while ((x = fgetc(file)) != EOF) {
             printf("%c", x);
+            fflush(stdout);
             nanosleep(&ts, NULL);
         }
 
+        fclose(file);
         return 0;
 }
 
 int
 main(int argc, char *argv[])
 {
-        process(argv[1]);
-        return 0;
+        return process(argv[1]);
 }