/in/foo.c:8:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'wang'
 ZX wang(float a[],int n)
    ^~~~
/in/foo.c: In function 'main':
/in/foo.c:33:15: error: 'a' undeclared (first use in this function)
   scanf("%f",&a[i]);
               ^
/in/foo.c:33:15: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:34:2: error: unknown type name 'ZX'
  ZX zx=wang(a,10);
  ^~
/in/foo.c:34:2: note: use 'struct' keyword to refer to the type
/in/foo.c:34:8: warning: implicit declaration of function 'wang' [-Wimplicit-function-declaration]
  ZX zx=wang(a,10);
        ^~~~
/in/foo.c:35:28: error: request for member 'max' in something not a structure or union
  printf("%.2f %.2f,%.2f",zx.max,zx.min,zx.ag);
                            ^
/in/foo.c:35:35: error: request for member 'min' in something not a structure or union
  printf("%.2f %.2f,%.2f",zx.max,zx.min,zx.ag);
                                   ^
/in/foo.c:35:42: error: request for member 'ag' in something not a structure or union
  printf("%.2f %.2f,%.2f",zx.max,zx.min,zx.ag);
                                          ^
/in/foo.c:34:5: warning: variable 'zx' set but not used [-Wunused-but-set-variable]
  ZX zx=wang(a,10);
     ^~