Hi, this is a C++ question.

I would like to know how to read a specific line in a txt file. For example, there is only one number on the first line, I would like to read that number on line 1. For the second line, I want to read in 5 pieces of data for my struct. For line 3-40, I want to read 4 pieces of data for another struct. What functions should I use?I have learn

ifstream infile ;

infile.open("data.txt);

while(!infile.eof()) ; so far. I am pretty sure that I have missed something. Can I use a for loop to read the data. And then at line 41 , I have to read in 5 pieces of data for my struct again. For the next 37 lines, I have to read in 4 pieces of data . How should I set the loop ? So my data look like this

1

3 3 3 3 3

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

3 3 3 3 3

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

3 3 3 3 3

2 2 2 2

2 2 2 2

2 2 2 2

2 2 2 2

......

The way I read data is infile >> struct.a >> struct.b etc .