#include <cstdio>
#include <regex.h>

int
match(const char *string, char *pattern)
{
    int    status;
    regex_t    re;

    if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB) != 0) {
        return(0);      /* report error */
    }
    status = regexec(&re, string, (size_t) 0, 0, 0);
    regfree(&re);
    if (status != 0) {
        return(0);      /* report error */
    }
    return(1);
}
char p[20];
int main()
{
	p[0]='e';
	p[1]='l';
	p[2]='l';
	p[3]='o';
	return match("helo",p);
}