Reprinted] use the fstream of C ++ to read text files with structured strings and mixed numeric values

Because it is necessary to frequently access text files with mixed strings and values, it is a headache for me to effectively read such files. However, I learned the log [1] today. the solution is as follows.

The target file dat.txt is as follows:

Zzz 8 10.0 2.5 2.55

Llz 10 20.2 3.9 4.96

The read/write method is programmed as follows:

# Include <fstream>

# Include <iostream>

Using namespace STD;

Void main ()

{

Ifstream fin;

Char name [20];

Int inum;

Float fnum [3];

Fin. Open ("dat.txt"); // open the file to be read

If (Fin. Good () // you can check whether the image is successfully opened.

{

While (! Fin. EOF ())

{

Fin> name; // read the string

Fin> inum; // read integer values

For (INT I = 0; I <3; I ++)

{

Fin> fnum [I]; // read floating point cyclically

}

Cout <name <''<inum <'' <fnum [2] <Endl; // check whether the result is correct.

}

}

Else

{

Cout <"file can't open" <Endl;

}

Fin. Close (); // close the file

}

The running result is as follows:

Zzz 8 2.55

Llz 10 4.96

Press any key to continue

Reference address:Http://blog.sciencenet.cn/blog-481152-433178.html