如何在函数中返回const char*？

Question

我给你们全部代码.这有点长,所以我最衷心地希望你得到它:

#include <iostream>
using namespace std;

char const* reverseWordsOnly(const char* s)
{
    int k;
    int p = strlen(s);


    for (int i = 0; i <= p; i++)
    {
        if (s[i] == ' ')
        {

            for (k = i - 1; (k != -1) && (s[k] != ' ') && (s[k] != ',') && (s[k] != ';') && (s[k] != '.'); k--)
                return &s[k];
            return " ";

        }
        if (s[i] == ',')
        {

            for (k = i - 1; (k != -1) && (s[k] != ' ') && (s[k] != ',') && (s[k] != ';') && (s[k] != '.'); k--)
                return &s[k];
            return ",";

        }
        if (s[i] == ';')
        {

            for (k = i - 1; (k != -1) && (s[k] != ' ') && (s[k] != ',') && (s[k] != ';') && (s[k] != '.'); k--)
                return &s[k];
            return ";";

        }
        if (s[i] == '.')
        {

            for (k = i - 1; (k != -1) && (s[k] != ' ') && (s[k] != ',') && (s[k] != ';') && (s[k] != '.'); k--)
                return &s[k];
            return ".";

        }
    }
}

int main()
{
    char s[1002];
    cin.getline(s, 1002, '\n');
    strcat(s, " ");
    reverseWordsOnly(s);
    return 0;
}

那么它做了什么..它颠倒了字母中字母的顺序.例如,如果你写下来Something.. terribly wrong.,它应该返回gnihtemoS.. ylbirret gnorw.间隔和点代表分隔符.问题是我必须使用这个非常精确的函数char const* reverseWordsOnly(const char*),我完全不知道如何使它与这些常量和指针一起工作.我编写的代码是完全可编译的,但只返回控制台中的空白区域.我做错了什么？有任何想法吗？如何在函数中返回那些指针值？

Answer 1

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

char const* reverseWordsOnly(const char* s){
    static string work;
    work = s;
    string::size_type start_pos = 0, end_pos;

    while(string::npos != (start_pos = work.find_first_not_of(" .,;", start_pos))){
        if(string::npos == (end_pos = work.find_first_of(" .,;", start_pos+1)))
            end_pos = work.length();
        reverse(&work[start_pos], &work[end_pos]);
        start_pos = end_pos + 1;
    }

    return work.c_str();
}

int main(){
    cout << reverseWordsOnly("Something.. terribly wrong.") <<endl;

    return 0;
}