can not open these pnm

[Charltsing]

2JohnC1V3.zip

[atiksoftware]

@Charltsing sory for late.
your file is 2JohnC1V3.ppm start with

P6
707  
441  
255

it should be

2 Byte magic
width - height
max value

like:

P6
707 441  
255

[Charltsing]

https://netpbm.sourceforge.net/doc/
https://netpbm.sourceforge.net/doc/ppm.html

A "magic number" for identifying the file type. A ppm image's magic number is the two characters "P6".
Whitespace (blanks, TABs, CRs, LFs).
A width, formatted as ASCII characters in decimal.
Whitespace.
A height, again in ASCII decimal.
Whitespace.

Whitespace not only blanks, ,but also TABs, CRs, LFs

[Charltsing]

PPM、PGM、PBM
"white space" character is space, CR, LF, TAB, VT, or FF (I.e. what the ANSI standard C isspace() function calls white space).

PAM Header
Each line ends with and is delimited by a newline character. an example header:

P7
WIDTH 227
HEIGHT 149
DEPTH 3
MAXVAL 255
TUPLTYPE RGB
ENDHDR

[atiksoftware]

@Charltsing its updated