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  1. #ifndef FUNC_H
  2. #define FUNC_H
  3.  
  4. #define ERROR 8888888888.9
  5. #define ERROR_END 8888888888.7
  6.  
  7. extern char debuf[50];
  8.  
  9. typedef struct {
  10.         double x, y;
  11. } TCoord;
  12.  
  13. double textwidth(const char* s, int len);
  14. double textheight(const char* s, int len);
  15.  
  16. typedef double (*function_t)(double);
  17. int isalpha(char c);
  18. double convert(const char* s, int* len);
  19.  
  20. #endif /* FUNC_H */
  21.