字符串中找连续最长的数字串

• 题目：
  

• 示例
  

• 代码实现

#include<iostream>#include<string>using namespace std;char * GetMaxCount(char *str,size_t size){    if (size == 0)        return NULL;    int count = 0;    int max = 0;    size_t i = 0;    char *cur = str;    char *start = NULL;    char *ret = start;    size_t j = 0;    while (i < size)    {        start = cur;        while (i < size && *cur >= '0' && *cur <= '9')        {            count++;            cur++;            i++;        }        if (i <= size)        {            if (count > max)            {                max = count;                j = i;                ret = start;                str[j] = '\0';            }            cur++;            i++;            count = 0;        }    }    return ret;}int main(){    string str;    getline(cin, str);    char *ret = GetMaxCount((char*)str.c_str(),str.size());    cout << ret;    return 0;}