顺带回应“无功”网友询问在字符串中提取数字的办法：

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

void Pause(const char* message);
bool ScanInteger(const char* str, int* value);

int main(void)
{
    const char* str = "asd123qwe45 6mnb789xyz";
    int value;

    while (ScanInteger(str, &value))
    {
        printf_s("%d\n", value);
        str = NULL;
    }

    Pause(NULL);
    return EXIT_SUCCESS;
}

void Pause(const char* message)
{
    if (message == NULL)
    {
        message = "\nPress <Enter> key to continue...";
    }
    fflush(stdin);
    getchar();
}

bool ScanInteger(const char* str, int* value)
{
    char buffer[20];
    static const char* ptrStr = NULL;
    char* ptrBuffer = buffer;
    bool begin = false;
    bool end = false;

    if (str != NULL)
    {
        ptrStr = str;
    }
    while ((*ptrStr++ != '\0') && !end)
    {
        if (isdigit(*ptrStr))
        {
            if (!begin)
            {
                begin = true;
            }
            *ptrBuffer++ = *ptrStr;
        }
        else
        {
            if (begin)
            {
                end = true;
                *ptrBuffer = '\0';
                *value = atoi(buffer);
            }
        }
    }
    --ptrStr;

    return end;
}



[ 本帖最后由 TonyDeng 于 2015-4-15 20:24 编辑 ]

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如果是提取字符串中的汉字的话该怎么呢？