I read a source file,found it writes "^M^J" to a output. I don't know what is it's meaning,
after test,I think it should be a return char,
my question is, where can i find defination of this?

yu ping wrote

I read a source file,found it writes "^M^J" to a output. I don't know what is it's meaning, after test,I think it should be a return char, my question is, where can i find defination of this?

It's simply the byte sequence 0Dh, 0Ah (or 0x0d, 0x0a of C aficionados, "Carriage Return"-"Line Feed") which is the end-of-line sequence for CP/M,DOS/Windows since the early '70s, and in contrast to Unix/Linux, which uses only a 0Ah, while at least the older Mac OS was using only a 0Dh to mark the end of a line in a text file...

Ralf

^A= 1
^b= 2
^c= 3
^d= 4
^e= 5
^f= 6
^g= 7
^h= 8
^i= 9
^j= 10
^k= 11
^l= 12
^m= 13
^n= 14
^o= 15
^p= 16
^q= 17
^r= 18
^s= 19
^t= 20
^u= 21
^v= 22
^w= 23
^x= 24
^y= 25
^z= 26

I wander how "^" symble works

2009/9/30 Ralf A. Quint :

It's a common abbreviation for the the 'Control' characters (decimal values 0-31, hex 00h-1Fh) in the ASCII alphabet representation. This should be the very basic of any programming introduction. A good online reference can be found at http://www.asciitable.com

Ralf