How to insert new line text in a file?

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leo john
leo john 2020-5-23
编辑： leo john 2020-5-24
fid1 = fopen('sample1.txt', 'a');
fprintf(fid1, '\n First line a b c d e f g h\n');
fclose(fid1);
fid2 = fopen('sample2.txt', 'a');
fprintf(fid2, '');
fprintf(fid2, '\nNew message in new line\n');
fclose(fid2);
Merge those two files into single file sample3.txt
I want to print those two lines one by one like below:
First line a b c d e f g h
New message in new line
Kindly do the needful
  2 个评论
Ameer Hamza
Ameer Hamza 2020-5-23
What is the error in your code? Also, there is no need to use two newlines.
leo john
leo john 2020-5-24
Suppose if i want to merge two files each file containing one line, after merging it i want the file with two separate lines which i am not able to done. Instead it is printing in the same line.

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