/in/foo.c:3:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable:4996)
 
/in/foo.c: In function 'main':
/in/foo.c:12:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (a >= 11 && a - b >= 2 || b >= 11 && b - a >= 2) {      //直接在输入字符的循环中顺便比完11分制
       ~~~~~~~~^~~~~~~~~~~~~
/in/foo.c:24:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if (a >= 21 && a - b >= 2 || b >= 21 && b - a >= 2) {
       ~~~~~~~~^~~~~~~~~~~~~