题解 | #左旋转字符串#

public:
    string LeftRotateString(string str, int n) {
        int test;
        if(n>str.length()){
            if(str.length()==0){
                return "";
            }
            while(n>str.length()){
                n-=str.length();
            }
            test=n;
        }
        else{
            test=n;
        }
        
        int i;
        string result="";
        for(i=n;i<=str.length()-1;i+=1){
            result+=str[i];
        }
        
        for(i=0;i<=n-1;i+=1){
            result+=str[i];
        }
        cout<<result<<endl;
        return result;
    }
};