/in/foo.c:6:4: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'wang'
 ZX wang(float a[],int n)
    ^~~~
/in/foo.c: In function 'main':
/in/foo.c:23:2: error: unknown type name 'ZX'
  ZX zx=wang(a,10);
  ^~
/in/foo.c:23:2: note: use 'struct' keyword to refer to the type
/in/foo.c:23:8: warning: implicit declaration of function 'wang' [-Wimplicit-function-declaration]
  ZX zx=wang(a,10);
        ^~~~
/in/foo.c:24:28: 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:24:35: 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:24:42: 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:23:5: warning: variable 'zx' set but not used [-Wunused-but-set-variable]
  ZX zx=wang(a,10);
     ^~