/in/foo.c: In function 'main':
/in/foo.c:11:13: error: expected '(' before '{' token
   11 |         {for{j=1;j<i;j++)
      |             ^
      |             (
/in/foo.c:11:19: warning: statement with no effect [-Wunused-value]
   11 |         {for{j=1;j<i;j++)
      |                  ~^~
/in/foo.c:11:25: error: expected ';' before ')' token
   11 |         {for{j=1;j<i;j++)
      |                         ^
      |                         ;
/in/foo.c:11:25: error: expected statement before ')' token
/in/foo.c:16:16: error: 'o' undeclared (first use in this function)
   16 |          for(i=o;i<n;i++)
      |                ^
/in/foo.c:16:16: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:22:1: error: expected declaration or statement at end of input
   22 | }
      | ^