/in/foo.c: In function 'wordchange':
/in/foo.c:7:8: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     {  for(j=i,k=i;isalpha(str[k]);k++);
        ^~~
/in/foo.c:8:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
      if(str[j]=='a' || str[k-1]=='e')
      ^~
/in/foo.c: In function 'main':
/in/foo.c:27:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string);
     ^~~~
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__;
              ^~~~
/tmp/cclV2Kua.o: In function `main':
foo.c:(.text.startup+0x9): warning: the `gets' function is dangerous and should not be used.