获取字符串中的数字串

来源：互联网发布：科比2003年总决赛数据编辑：程序博客网时间：2024/06/04 21:40

#include <cstring>#include <cstdlib>#include <iostream>#include <vector>using namespace std;// 获取字符串中的数字串void pickNum(const char* str, vector<char*>& numVec){// 验证参数有效性if(str == NULL || strlen(str) == 0){cerr << "invalid parameter";return;}const char* start = str;while(*start != '\0'){// 定位到数字字符串的头while(*start != '\0' && (*start > '9' || *start < '0')){++start;}const char* end = start;// 定位到数字字符串尾下一个字符while(*end != '\0' && *end >= '0' && *end <= '9'){++end;}if(*start != '\0'){int len = end - start;char* numStr = new char[len + 1];memcpy(numStr, start, len);numStr[len] = '\0';numVec.push_back(numStr);}start = end;}}int main(int argc, char* argv[]){// 测试用例vector<const char*> strVec;strVec.push_back(NULL);strVec.push_back("");strVec.push_back("abc");strVec.push_back("a1b2c");strVec.push_back("a12b2c13");strVec.push_back("0a1b2c3");strVec.push_back("01234");for(int strIdx = 0; strIdx < strVec.size(); ++strIdx){cout << strIdx << " : ";if(strVec[strIdx] != NULL){cout << strVec[strIdx];}cout << " : ";vector<char*> numVec;pickNum(strVec[strIdx], numVec);for(int numIdx = 0; numIdx < numVec.size(); ++numIdx){cout << numVec[numIdx] << ' ';}cout << endl;}return 0;}

运行结果:

0 : : invalid parameter
1 : : invalid parameter
2 : abc :
3 : a1b2c : 1 2
4 : a12b2c13 : 12 2 13
5 : 0a1b2c3 : 0 1 2 3
6 : 01234 : 01234

0 0