C++检测一个文件是否存在

ifstream::is_open - C++ Reference

http://www.cplusplus.com/reference/fstream/ifstream/is_open/

1 // ifstream::is_open
 2 #include <iostream>     // std::cout
 3 #include <fstream>      // std::ifstream
 4 
 5 int main () {
 6   std::ifstream ifs ("test.txt");
 7 
 8   if (ifs.is_open()) {
 9     // print file:
10     char c = ifs.get();
11     while (ifs.good()) {
12       std::cout << c;
13       c = ifs.get();
14     }
15   }
16   else {
17     // show message:
18     std::cout << "Error opening file";
19   }
20 
21   return 0;
22 }

原文链接: https://www.cnblogs.com/pegasus923/p/5640920.html

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