Language: C

main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}

Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      | ^~~~
main.c: In function 'main':
main.c:1:1: error: type of 'a' defaults to 'int' [-Wimplicit-int]
main.c:1:1: error: type of 'b' defaults to 'int' [-Wimplicit-int]
main.c:1:1: error: type of 'c' defaults to 'int' [-Wimplicit-int]
main.c:1:13: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |             ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
main.c:1:13: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |             ^~~~~
main.c:1:13: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:28: error: '$a' undeclared (first use in this function); did you mean 'a'?
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                            ^~
      |                            a
main.c:1:28: note: each undeclared identifier is reported only once for each function it appears in
main.c:1:31: error: '$b' undeclared (first use in this function); did you mean 'b'?
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                               ^~
      |                               b
main.c:1:34: error: '$c' undeclared (first use in this function); did you mean 'c'?
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                                  ^~
      |                                  c
main.c:1:38: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                                      ^~~~~~
main.c:1:38: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:38: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:38: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:59: error: implicit declaration of function 'fmax' [-Wimplicit-function-declaration]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                                                           ^~~~
main.c:1:1: note: include '<math.h>' or provide a declaration of 'fmax'
  +++ |+#include <math.h>
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
main.c:1:59: warning: incompatible implicit declaration of built-in function 'fmax' [-Wbuiltin-declaration-mismatch]
    1 | main(a,b,c){scanf("%d%d%d",$a,$b,$c)<printf("%.f",a+b+c+9*fmax(a,b<c?c:b));}
      |                                                           ^~~~
main.c:1:59: note: include '<math.h>' or provide a declaration of 'fmax'