Error(s):

source_file.c:2:6: warning: return type of ‘main’ is not ‘int’ [-Wmain]
 void main()
      ^
source_file.c: In function ‘main’:
source_file.c:6:10: warning: operation on ‘a’ may be undefined [-Wsequence-point]
 xyz(++a,a++);
          ^
source_file.c:7:9: warning: operation on ‘a’ may be undefined [-Wsequence-point]
 xyz(a++,++a);
         ^
source_file.c: At top level:
source_file.c:10:17: error: unknown type name ‘inty’
 void xyz(int x, inty){
                 ^