/in/foo.cc: In function 'int SearchRemove(int*, int, int)':
/in/foo.cc:27:57: error: a function-definition is not allowed here before '{' token
  int set_union(int a[],int na,  int b[],int nb, int c[]){ 
                                                         ^
/in/foo.cc:31:11: error: a function-definition is not allowed here before '{' token
 int main(){ 
           ^
/in/foo.cc:39:1: error: expected '}' at end of input
 }
 ^