/in/foo.c: In function 'main':
/in/foo.c:6:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(a);
  ^~~~
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:14:5: error: expected '(' before '{' token
   if{(a[i]-'a'+n)<=26}
     ^
/in/foo.c:14:18: warning: statement with no effect [-Wunused-value]
   if{(a[i]-'a'+n)<=26}
      ~~~~~~~~~~~~^~~~
/in/foo.c:14:22: error: expected ';' before '}' token
   if{(a[i]-'a'+n)<=26}
                      ^
/in/foo.c:16:5: error: expected '(' before '{' token
   if{(a[i]-'a'+n)<26}
     ^
/in/foo.c:16:18: warning: statement with no effect [-Wunused-value]
   if{(a[i]-'a'+n)<26}
      ~~~~~~~~~~~~^~~
/in/foo.c:16:21: error: expected ';' before '}' token
   if{(a[i]-'a'+n)<26}
                     ^
/in/foo.c:21:5: error: expected '(' before '{' token
   if{(a[i]-'A'+n)<=26}
     ^
/in/foo.c:21:18: warning: statement with no effect [-Wunused-value]
   if{(a[i]-'A'+n)<=26}
      ~~~~~~~~~~~~^~~~
/in/foo.c:21:22: error: expected ';' before '}' token
   if{(a[i]-'A'+n)<=26}
                      ^
/in/foo.c:23:5: error: expected '(' before '{' token
   if{(a[i]-'A'+n)<26}
     ^
/in/foo.c:23:18: warning: statement with no effect [-Wunused-value]
   if{(a[i]-'A'+n)<26}
      ~~~~~~~~~~~~^~~
/in/foo.c:23:21: error: expected ';' before '}' token
   if{(a[i]-'A'+n)<26}
                     ^