程序代码：

// 单元化字符串.cpp : 定义控制台应用程序的入口点。
//
#define _STDC_WANT_LIB_EXT1_ 1
#include "stdafx.h"
#include<stdlib.h>
#include<string.h>
#include <stdbool.h>
int main()
{
    char delimiters[] = "\".,;:!?)(";//确定定界符。
    char buf[100];//键盘输入线的缓冲器 。
    char str[1000];//
    char* ptr = NULL;
    size_t str_len = sizeof(str);
    size_t buf_len = sizeof(buf);
    printf("Enter some prose that less than %zd characters.\n"
                    "Terminate input by entering an empty line:\n"str_len);
    while (ture)
    {
        if (!gets_s(buf, buf_len))
        {
            printf("Error reading string.\n");
            return 1;
        }
        if (!strnlen_s(buf, buf_len))
            break;
        if (strcat_s(str, str_len, buf))
        {
            printf("Mximum permitted input length exceeded.\n");
            return;
        }
    }
    printf("the words in the prose that you entered are:\n", str);//找到并列出找到的所有词。
    unsigned int word_count = 0;
    char * pWord = strtok_s(str, &str_len, delimiters, &ptr);
    if (pWord)
    {
        do
        {
            printf("%-18s", pWord);
            if (++word_count % 5 == 0)
                printf("\n");
            pWord = strtok_s(NULL, &str_len, delimiters, &ptr);
        } while (pWord);
        printf("\n%u words found.\n", word_count);
    }
    else
        printf("No woeds found.\n");
    system("pause");
    return 0;
}

[local]1[/local]

单元化字符串 - Microsoft Visual Studio 2017_5_24 17_31_58.png (404.78 KB)

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