文件 IO

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
#include <iostream>
#include <fstream>
#include <sstream>
#include <stdexcept>
using namespace std;
int main(int argc, char *argv[])
{
if(argc != 3){
string err_info;
ostringstream oss(err_info);
oss << argv[0] << " dir1/file1 dir2/file2" << endl;
cerr << oss.str();
return -1;
}
string in = argv[1];
string out = argv[2];
string content;
ifstream ifs(in.c_str());
ofstream ofs(out.c_str());
if (!ifs) {
cerr << "error: unable to open input file: "
<< in << endl;
return -1;
}
if (!ofs) {
cerr << "error: unable to open output file: "
<< out << endl;
return -1;
}
while(getline(ifs, content)){
ofs << content << endl;
}
}

其他资源

Comments