[面试编程题]算法基础-字符移位

错误代码

#include<iostream>
#include<string>
using namespace std;
bool isLow(char c)
{
    if( (c>='A') && (c<='Z'))
        return false;
    else 
        return true;
}
bool isCap(char c)
{
    return !isLow(c);    
}

int main()
{
    string s;
    while(cin>>s)
    {
        int n=s.size();
        int l=0,r=n-1;
        
        while(l<r)
        {
            while(r>=0 && isCap(s[r])) r--;//r最右边的一个小写字母
            while(l<=n-1 && isLow(s[l])) l++;//l指向最左边的大写字母
            if(l<r)
                swap(s[l],s[r]);
            else 
                break;
        }
        cout<<s<<endl;
    }
}

测试用例

测试用例:
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
对应输出应该为:
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
你的输出为:
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