在一个字符串中找出连续最长的数字串 - 曲径通幽论坛

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int findnumstring(char *outputstr, char *inputstr)
{
    char *in = inputstr, *out = outputstr, *temp, *final;
    int count = 0, maxlen = 0, i;

    while( *in != '\0' )
    {
        if( *in > 47 && *in < 58 ) {

            for(temp = in; *in > 47 && *in < 58; in++)
                count++;
        }
        else
           in++;

        if( maxlen < count ) {
            maxlen = count;
            final = temp;
        }

        count = 0;
    }

    for(i = 0; i < maxlen; i++)
    {
        *out = *final;
        out++;
        final++;
    }
    *out = '\0';

    return maxlen;
}

int main()
{
    char string[] = "abcd12345eee125ss123456789";
    char *p = (char *)malloc( strlen(string) + 1);
    int count = findnumstring(p, string);

    printf("%s\nnumber string length = %d\n", p, count);

    return 0;

}