/in/foo.c: In function 'main':
/in/foo.c:7:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(i=1;i<=n;i++)
  ^~~
/in/foo.c:9:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   int a,b;
   ^~~
/in/foo.c:25:19: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   else if(shang>=5&&xia<5||shang<5&&xia>=5);
           ~~~~~~~~^~~~~~~
/in/foo.c:29:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   else if(zuo>=5&&you<5||zuo<5&&you>=5);
           ~~~~~~^~~~~~~
/in/foo.c:33:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   else if(zs>=5&&yx<5||zs<5&&yx>=5);
           ~~~~~^~~~~~
/in/foo.c:37:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   else if(zx>=5&&ys<5||zx<5&&ys>=5);
           ~~~~~^~~~~~