Question

这是一个程序，我输入一个句子并向后打印......

#include<iostream>
#include<string>
using namespace std;

int main(int argc, char* argv[]) {
    string scrambleWords;
    cout << "Please enter a sentence to scramble: ";
    getline(cin, scrambleWords);

    for (int print = scrambleWords.length() - 1; print >= 0; print--)
    {
        if (isspace(scrambleWords[print]))
        {
            for (unsigned int printIt = print + 1; 
                         printIt < scrambleWords.length(); printIt++)
            {
                cout << scrambleWords[printIt];
                if (isspace(scrambleWords[printIt]))
                    break;
            }
        }
    }

    for (unsigned int gotIt = 0; gotIt < scrambleWords.length(); gotIt++)
    {
        cout << scrambleWords[gotIt];
        if (isspace(scrambleWords[gotIt]))
            break;
    }
    cout << endl;
}

// OUTPUT
// Please enter a sentence: birds and bees
// beesand birds
// Press any key to continue . . .

正如你所看到的，蜜蜂与蜜蜂之间没有空间。鸟类，那么如何在那里添加空间呢？

Answer 1

您可以使用（{C ++ 11 for auto）:( http://ideone.com/mxOCM1）

void print_reverse(std::string s)
{
    std::reverse(s.begin(), s.end());
    for (auto it = s.begin(); it != s.end(); ) {
        auto it2 = std::find(it, s.end(), ' ');
        std::reverse(it, it2);
        it = it2;
        if (it != s.end()) {
            ++it;
        }
    }
    std::cout << s << std::endl;
}

Answer 2

您可以使用（{C ++ 11 for auto）:( http://ideone.com/mxOCM1）

void print_reverse(std::string s)
{
    std::reverse(s.begin(), s.end());
    for (auto it = s.begin(); it != s.end(); ) {
        auto it2 = std::find(it, s.end(), ' ');
        std::reverse(it, it2);
        it = it2;
        if (it != s.end()) {
            ++it;
        }
    }
    std::cout << s << std::endl;
}

Answer 3

到达原始输入行的末尾时添加空格：

if printIt == scrambleWords.length()-1
    cout << " ";

在

之后将此代码放在内部for循环中

if (isspace(scrambleWords[printIt]))
    break;

请注意，打破for循环不会赢得任何编程选美比赛。

用c ++向后打印

3 个答案: