vs 2010 正则表达式校验

#include <sys/types.h> #include "regex.h" #include <stdio.h> #include <string.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 = REG_EXTENDED | REG_NOSUB ; char ebuf[128]; char 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( &reg, pattern,cflags); if (z != 0) { regerror(z, &reg, 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(&reg, lbuf, nmatch, pm, 0); if (z == REG_NOMATCH) return 0; else if (z != 0) { regerror(z, &reg, 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(&reg); return 0; }