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转置字符串,其中单词内的字符需要正常

如题:转置一个字符串,需要其中的单词正常

例如:

Given s = "the sky is blue",
return "blue is sky the".

需要说明的是:

1、输入字符串可能会出现:前导空格,后置空格,要求输出的不能有前导空格和后置空格。

2、输入的语句中可能有两个单词之间出现多个空格,输出两个单词之间只能由一个空格。

#include <iostream>#include <string>using namespace std;void reverse(string &s,int start,int end){    while (start<end)    {        char tem = s[start];        s[start] = s[end];        s[end] = tem;        start++;        end--;    }}void reverseString(string &s){    if (s.empty()||s.length()==0)    {        return;    }    //去除前置和后置空格    int num1 = s.find_first_not_of(" ");    if (num1 == -1){        s = "";        return;    }    int num2 = s.find_last_not_of(" ");    s = s.substr(num1,num2-num1+1);    int start = 0,end = 0;    int size = s.length();    end = size-1;    //整个字符串倒置    reverse(s,start,end);    //两个单词之间有多个空格的情况    int count = 0;    for (int i = 0; i < size; i++)    {        if(s[i] ==    && s[i+1] ==  )continue;        s[count++]=s[i];                }    if(count<size)s = s.substr(0,count);    size = s.size();    start = 0;    end = -2;    //其中每个单词倒置    for (int i = 0; i < size; i++)    {        if(s[i] ==  )        {            start = end+2;            end = i-1;            reverse(s,start,end);        }        if(i == size-1){            start = end+2;            end = i;            reverse(s,start,end);        }    }}int main(int argc, char **argv){        string s = "   a   b ";    cout<<"before reverse: "<<s<<endl;    reverseString(s);    cout<<"after reverse: "<<s<<endl;    return 0;}

 

转置字符串,其中单词内的字符需要正常