c++数据类型练习

乱序文件输出有序

string str=“020h2j”;转为int型为：20
string str=“h2j”;转为int型为：0

#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
int main()
{
	ifstream in("1.txt");
	string name;
	vectorimage;
	while (getline(in, name))
	{
		for (int i = 0; i < 4; i++)
		{
			name.pop_back();
		}
		//string删除指定字符
		//name.erase(remove(name.begin(), name.end(), 'b'), name.end());
		name.erase(name.size()-4,4);//从size-4开始删除4个字符
		int number = atoi(name.c_str());
		image.push_back(number);
	}
	sort(image.begin(), image.end());
	for (int i = 0; i < image.size(); i++)
	{
		cout << image[i] << endl;
	}
	system("pause");
	return 0;
}