foo.c: In function 'main':
foo.c:16:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   16 |         if(a>b>c){
      |            ~^~
foo.c:19:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   19 |         if(b>a>c){
      |            ~^~
foo.c:22:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   22 |         if(c>a>b){
      |            ~^~
foo.c:25:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   25 |         if(a>c>b){
      |            ~^~
foo.c:27:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   27 |         if(b>c>a){printf("%d %d %d",b,c,a);
      |            ~^~
foo.c:29:13: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
   29 |         if(c>b>a){
      |            ~^~
foo.c:8:13: warning: 'a' is used uninitialized [-Wuninitialized]
    8 |         int max=a;
      |             ^~~
foo.c:5:7: note: 'a' declared here
    5 |   int a;
      |       ^

[Hydro](https://hydro.ac)提供评测服务