/in/foo.c: In function 'main':
/in/foo.c:6:10: error: expected ')' before '{' token
 if (x1>x2{
          ^
/in/foo.c:21:1: error: expected expression before '}' token
 }
 ^
/in/foo.c:3:22: warning: unused variable 'y3' [-Wunused-variable]
 int x1,x2; int y1,y2,y3;
                      ^~
/in/foo.c:3:19: warning: unused variable 'y2' [-Wunused-variable]
 int x1,x2; int y1,y2,y3;
                   ^~
/in/foo.c:3:16: warning: unused variable 'y1' [-Wunused-variable]
 int x1,x2; int y1,y2,y3;
                ^~