在c++中立即设置故障位(在读取任何字节之前)

Question

我正在尝试使用ios包读取csv文件，但没有读取任何内容。我检查了filestream中的故障位，由于某种原因，它在我实际读取任何内容之前就被立即设置了。这是我的代码：

#include <fstream>
#include <iostream> 
using namespace std;
int main(int argc, char* argv[]){
    ifstream infile("~/txs_sample3.csv");
        cout<<"badbit: "<<infile.bad()<<
        ", failbit: "<<infile.fail()<<
        ", eof: "<<infile.eof()<<
        ", good: "<<infile.good()<<endl;
}

txs_sample3.csv：

block-number,gas,gas-price,gas-used,value,from,hash,timestamp,to
2100001,132650,20000000000,32650,1023220.89,0x8224ec27ed526e48cbaba8cb603b1d092e210ebb,0xc3deb238df92f77a41508bb1f731b17c03603f9f5ee802f043a0e35bff6160e7,1471600276,0xe94b04a0fed112f3664e45adb2b8915693dd5ff3
2100001,250000,20000000000,21000,1048570.97,0x9e6316f44baeeee5d41a1070516cc5fa47baf227,0xce7f6bfef33e1982a727b78118faaa55a7f0d9f87240b4a717ea08a8d6b5818b,1471600276,0x29158e02823fdd9cbc66dd3d4a9c51b9df88f823
2100001,90000,20000000000,21000,1010199.4901117386,0xea674fdde714fd979de3edf0f56aa9716b898ec8,0xec2493c5da6a8e562bdffba2c0a7dc7ed1ed261100f013b69a6a764032586c75,1471600276,0xc976d91972173ec9698a9e190f8cd8541e18d2be
2100001,21000,20000000000,21000,1489845.61,0xa8e8311be097afc3537dd084cdd507d6436d72b7,0xb2c139c4038c7c677ff45a197e8724f517ef2bb04eaf0ee7003182663f2ce65f,1471600276,0x91337a300e0361bddb2e377dd4e88ccb7796663d

这里发生了什么事有什么帮助吗？

-Paul

Answer 1

ifstream与fopen和open函数一样，不对~字符进行插值。您需要自己使用不同的路径名或添加getenv("HOME")。