/in/foo.c: In function 'main':
/in/foo.c:8:5: error: expected expression before 'for'
     for(i=0;i<=100;i++)
     ^~~
/in/foo.c:16:1: error: expected ';' before '}' token
 }
 ^
/in/foo.c:6:18: warning: unused variable 'c2' [-Wunused-variable]
     char c1[100],c2[100];
                  ^~
/in/foo.c:6:10: warning: unused variable 'c1' [-Wunused-variable]
     char c1[100],c2[100];
          ^~
/in/foo.c:5:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j;
        ^
/in/foo.c:5:6: warning: unused variable 'i' [-Wunused-variable]
  int i,j;
      ^