C-language escape characters and type conversion

1, \ DDD indicates octal.

Application: \ 101 output letter,

CodeAs follows:

Char CH = '\ 101 ';
Printf ("% C", CH );

2 InC LanguageWhen forced type conversion is performed, an intermediate variable of the required type is obtained. The type of the original variable has not changed,

Float F;
Int I;
F = 3.4;
I = (INT) F;
Printf ("I = % d, f = % F", I, F );

The output of this sentence is 3 and 3.4, and the variable F is still 3.4.

 

 

3. the following code is used to combine operators:

Int II;
II = 3;
Printf ("-II ++ = % d \ n",-II ++ );
Printf ("II = % d \ n", ii)

The output result is-II ++ =-3;

II = 4. That is to say, the negative sign itself does not affect the value of II, and the value that affects II is the ++ operator.

4. In C,

Int I, J;
I = 3, j = 4;
Printf ("I ++ J = % d", I ++ J );
Printf ("\ n % d", I );

The running result of the following code is: I ++ J = 7

4

I ++ J is equivalent to (I ++) + J

In this case, the C compilation system converts as many characters as possible into operators.