while reading a text, how to find the asicii control characters and then display them

this will run just like "cat -v filename"

if there is some control characters in the filename, such like control A, control B...

normal these control characters is not able to print out, but after program, they can be print out..


my point is, i dont know how to separate control characters with other normal character, and then how can i make is displayable..??
i tried to use iscotrl() to check the control character, but it cant separate '\n' with control characters...

anyway, thx for help

regards

Assuming ascii, how about

Code:

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if (c < ' ' && c != '\n') { /* add  && c != '\t' if you don't want tabs either */
    printf("^%c", c + ('A' - 1));
}

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is it? thats nice.. thx ogaga

Quote:

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Originally Posted by yang

normal these control characters is not able to print out,

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ctype.h, isprint()


Quzah.

i tried it, !isprint() is same as < ' '

thx~