ansi-c converting char to int representable by ascii -

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Hello I'm interested in the characters that are worthy of representation by the ascii table, due to this I am doing the following: 

  int t (char c) {return (int) c; } ... if (! (T (D)> 255)) {Dostf (); }

So I'm only interested in representable characters in the ascii table, which should be less than 256 after conversion, am I right? Thanks!

four is an integral type in C. You can do this directly: 

  Four C; Specify / * C * if (C & gt; = 0 & amp; amp; c; & lt; = 127) {/ * in ASCII range} /

T isascii () (this is not in C standard, although it is POSIX).

In addition, you can check that is equivalent to CHAR_MAX 127. If so, you do not need to compare it with 127, because c will not exceed the definition. Similarly, if is CHAR_MIN 0, then you compare it with 0 do not require. Both the CHAR_MIN and CHAR_MAX are defined in the boundaries .h .

I think you are thinking about an integer value by filling out a char , and so change it to a int . But, it does not help overflow because the damage has already happened.


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