#ifndef _UTILS_H
#define _UTILS_H

int strcom(char *s, char *t);
int numcom(char *s, char *t);
void pswap(void **v, void **w);
double atof(char *s);
int isdigit(char c);
int getline(char *s, int len);
int readlines(char *lineptr[], int maxlines);
void writelines(char *lineptr[], int maxlines);
char *alloc(int len);
void strcopy(char *s, char *t);
int toupper(char c);
int getch();
int ungetch(char c);
int isalpha(char c);
int isalnum(char c);
int isspace(char c);
char *strcat(char *s, char *ct);

#endif /* _UTILS_H */