How to write the data in txt file into other txt file [closed]
I am working on reading the data from one file "file1.txt" having format
0
0.0003
0.0006
-0.0130
-0.5542
-0.2587
2.2455e-04 -7.9772e-05 2.7506e-05
-7.9772e-05 4.3190e-05 -1.7369e-05
2.7506e-05 -1.7369e-05 3.0509e-05
0.03
0.0003
0.0006
-0.0147
-0.5546
-0.2560
2.2455e-04 -7.9772e-05 2.7506e-05
-7.9772e-05 4.3190e-05 -1.7369e-05
2.7506e-05 -1.7369e-05 3.0509e-05
0.06
0.0003
0.0006
-0.0163
-0.5551
-0.2533
2.2455e-04 -7.9772e-05 2.7506e-05
-7.9772e-05 4.3190e-05 -1.7369e-05
2.7506e-05 -1.7369e-05 3.0509e-05
and want to save in other file "file2.txt" with following format
0 -0.0130 2.2455e-04 -7.9772e-05 2.7506e-05
0.0003 -0.5542 -7.9772e-05 4.3190e-05 -1.7369e-05
0.0006 -0.2587 2.7506e-05 -1.7369e-05 3.0509e-05
0.03 -0.0147 2.2455e-04 -7.9772e-05 2.7506e-05
0.0003 -0.5546 -7.9772e-05 4.3190e-05 -1.7369e-05
0.0006 -0.2560 2.7506e-05 -1.7369e-05 3.0509e-05
0.06 -0.0163 2.2455e-04 -7.9772e-05 2.7506e-05
0.0003 -0.5551 -7.9772e-05 4.3190e-05 -1.7369e-05
0.0006 -0.2533 2.7506e-05 -1.7369e-05 3.0509e-05
I am working on C++ programming. I know its simple question and i have also given a many try to solve it but failed. If any one can help, i will be thankful.
Thank You
I'm sorry, but this is not a ROS question. It reads like a C++ issue.
As we have far too many questions here already, we must try to stay on-topic as much as possible.
Because of this, I've closed your question. Please post it on a forum dedicated to these kind of issues, such as Stack Exchange or Stack Overflow.