/in/foo.c: In function 'main':
/in/foo.c:30:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(str1);
  ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:30:7: warning: passing argument 1 of 'gets' from incompatible pointer type [-Wincompatible-pointer-types]
  gets(str1);
       ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: expected 'char *' but argument is of type 'int *'
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:31:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(str2);
  ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:31:7: warning: passing argument 1 of 'gets' from incompatible pointer type [-Wincompatible-pointer-types]
  gets(str2);
       ^~~~
In file included from /in/foo.c:1:0:
/usr/include/stdio.h:640:14: note: expected 'char *' but argument is of type 'int *'
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/in/foo.c:32:25: warning: passing argument 1 of 'count2' from incompatible pointer type [-Wincompatible-pointer-types]
  printf("%d %d", count2(str1)-count1(str1), count2(str2)-count1(str2));
                         ^~~~
/in/foo.c:15:5: note: expected 'char *' but argument is of type 'int *'
 int count2(char* str)
     ^~~~~~
/in/foo.c:32:38: warning: passing argument 1 of 'count1' from incompatible pointer type [-Wincompatible-pointer-types]
  printf("%d %d", count2(str1)-count1(str1), count2(str2)-count1(str2));
                                      ^~~~
/in/foo.c:4:5: note: expected 'char *' but argument is of type 'int *'
 int count1(char* str)
     ^~~~~~
/in/foo.c:32:52: warning: passing argument 1 of 'count2' from incompatible pointer type [-Wincompatible-pointer-types]
  printf("%d %d", count2(str1)-count1(str1), count2(str2)-count1(str2));
                                                    ^~~~
/in/foo.c:15:5: note: expected 'char *' but argument is of type 'int *'
 int count2(char* str)
     ^~~~~~
/in/foo.c:32:65: warning: passing argument 1 of 'count1' from incompatible pointer type [-Wincompatible-pointer-types]
  printf("%d %d", count2(str1)-count1(str1), count2(str2)-count1(str2));
                                                                 ^~~~
/in/foo.c:4:5: note: expected 'char *' but argument is of type 'int *'
 int count1(char* str)
     ^~~~~~
/tmp/ccGBMecE.o: In function `main':
foo.c:(.text.startup+0x18): warning: the `gets' function is dangerous and should not be used.