c - Passing enum variable to a function -


hi have function below.

void turnright(enum direction heading, int x, int y){  if(y<=49 && heading==toright){     heading=todown;     x=x+1;  } else if(x<=49 && heading==todown){     heading=toleft;     y=y-1; } else if(x>0 && heading==toleft){     heading=toup;     x=x-1; } else if(y<=49&&heading==toup){     heading=toright;     y=y+1; }  else      printf("can not turn right! boundary alert!");  }//end function

i declared enum in main as:

enum direction {todown, toup, toright, toleft}; static enum direction heading; heading=toright;

and calling function main 

turnright(heading, x, y);

and above added prototype as: 

  void turnright(enum direction heading, int x, int y);

but compiler spits below errors over:

error c2065: 'todown' : undeclared identifier error c2065: 'toup' : undeclared identifier error c2065: 'toleft' : undeclared identifier error c2065: 'toright' : undeclared identifier

can tell me doing wrong?

i declared enum in main

you need declare enum direction in file included in translation units use enum, not in main. example, can define in direction.h (don't forget add inclusion guards), , include in both main , turn-processing source files:

direction.h

#ifndef direction_h #define direction_h  enum direction {todown, toup, toright, toleft};  #endif

now add #include "direction.h" main , other files using enum make sources compile correctly.


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