C语言正则匹配库(regex.h)

教程: https://blog.csdn.net/ljp1919/article/details/47753559
尝试:

#include
#include
#include

int main(int argn, char **argv)
{
	char *pattern = "[0-9]*qq.com";
	char *string = argv[1];
	char buf[100];
	int ret = 0;
	int i = 0;

	// 存放匹配后的信息
	const size_t nmatch = 5;
	regmatch_t pm[5];
	// 存放编译后的信息
	regex_t reg;
	
	// 编译
	ret = regcomp(®, pattern, REG_EXTENDED);
	if (ret != 0)
	{
		printf("编译错误n");
		return -1;
	}
	
	// 匹配
	ret = regexec(®, string, nmatch, pm, 0);
	if (ret == REG_NOMATCH)
	{
		printf("未匹配到结果n");
		return 0;
	}
	else if (ret != 0)
	{
		printf("匹配错误n");
		return -1;
	}
	
	// 输出匹配结果
	for (i=0;i
		strncpy(buf, string+pm[i].rm_so, pm[i].rm_eo-pm[i].rm_so);
		printf("%d: %sn", i, buf);
	}

	// 释放
	regfree(®);

	return 0;
}