上图源自：https://blog.csdn.net/LG1259156776/article/details/47035583

1 打开文件

法 1	法 2
ofstream file(path);	ofstream file; file.open(path);

#include<bits/stdc++.h>
using namespace std;int main()
{char path[] = "./test.txt";//ofstream file(path); // 法1 ofstream file;file.open(path); // 法2 if(!file){cout << "can not open the " << path + 2 << "!" <<endl;exit(0);}elsecout << path + 2 << " has been opened!" << endl << endl;file.close();system("pause");return 0;
}

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	file.close();