Qt - How to count number of line in .txt file

问题

I want to count number of line in text file, so i can convert it to two dimensional array

The text file should be like this

20
30
78
1000
....
....

and source code using QFile to access file

QFile file("c:/Qt/in.txt");
file.open(QIODevice::ReadOnly); //| QIODevice::Text)
y = linecount/5;
QString line[y][5];
QTextStream in(&file);
for (int k=0;k<=y;k++)
{
    for (int x=0;x<=4;x++)
    {
        line[i][x] = in.readLine();
    }
}

回答1:

Your Question is not clear, and also some parameters in your code. For counting number of lines in a file, it is as simple as given below. You can use array line to populate your 2-d array.

QFile file("c:/Qt/in.txt");
int line_count=0;
file.open(QIODevice::ReadOnly); //| QIODevice::Text)
QString line[100];
QTextStream in(&file);
while( !in.atEnd())
{
    line[line_count]=in.readLine();
    line_count++;
}

来源：https://stackoverflow.com/questions/10589098/qt-how-to-count-number-of-line-in-txt-file