字符串转化成数字C++实现

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int number = 0;
	std::string s;
    cin>>s;
	for(int i = 0; i < s.length();i ++){
		number = number* 10 + s[i] - '0';
		
	} 
	printf("number =% d\n",number);
	return 0;
}