ACWING 78. 左旋转字符串 --语法基础题（substr）

原题链接：https://www.acwing.com/problem/content/74/
substr用法

https://blog.csdn.net/m0_46512929/article/details/121394174

#include <iostream>
using namespace std;
string leftRotateString(string str,int n){
	return str.substr(n,str.length()) + str.substr(0,n);  
}
int main(void) {
	int n;
	cin >> n;
	string str = "hello";
	string str1 = leftRotateString(str,n);
	cout << str1 << endl;
}