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运行了下楼主的程序,怎么是:Segmentation fault
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
/* 取子串的函数 */
static char* substr(const char*str, unsigned start, unsigned end)
{
unsigned n = end - start;
static char stbuf[256];
strncpy(stbuf, str + start, n);
stbuf[n] = 0;
return stbuf;
}
/* 主程序 */
int main(int argc, char** argv)
{
char * pattern;
int x, z, lno = 0, cflags = 0;
char ebuf[128], lbuf[256];
regex_t reg;
regmatch_t pm[10];
const size_t nmatch = 10;
/* 编译正则表达式*/
pattern = argv[1];
z = regcomp(®, pattern, cflags);
if (z != 0){
regerror(z, ®, ebuf, sizeof(ebuf));
fprintf(stderr, "%s: pattern '%s' \n", ebuf, pattern);
return 1;
}
/* 逐行处理输入的数据 */
while(fgets(lbuf, sizeof(lbuf), stdin)) {
++lno;
if ((z = strlen(lbuf)) >0 && lbuf[z-1] == '\n')
lbuf[z - 1] = 0;
/* 对每一行应用正则表达式进行匹配 */
z = regexec(®, lbuf, nmatch, pm, 0);
if (z == REG_NOMATCH) continue;
else if (z != 0) {
regerror(z, ®, ebuf, sizeof(ebuf));
fprintf(stderr, "%s: regcom('%s')\n", ebuf, lbuf);
return 2;
}
/* 输出处理结果 */
for (x = 0; x < nmatch && pm[x].rm_so != -1; ++ x) {
if (!x) printf("%04d: %s\n", lno, lbuf);
printf(" $%d='%s'\n", x, substr(lbuf, pm[x].rm_so, pm[x].rm_eo));
}
}
/* 释放正则表达式 */
regfree(®);
return 0;
}
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