Data types in 2_c languages (v) Char

1.1 Char Type 1.1.1 Char constant, variable

char c; Define a char variable

' A ', constant of Char

The essence of char is an integer, an integer with a size of only 1 bytes

1.1.2 printf Output Char

%c means to output a character instead of an integer

1.1.3 non-printable char escape character

\a, Alarm.

\b Backspace

\ nthe line break

\ r Enter

\ t tab

\ \ Slash

\ ' Single quotation mark

\ "Double quotation marks

\? Question mark

1.1.4 Char and unsigned char

Char values range from 128 to 127

unsigned char is 0-255

#include <stdio.h>intMain01 () {CharC//define a variable of type charc ='a'; printf ("%c\n", c); //C = 4;//c equals an integer 4//C = ' 4 ';//c equals one character 4c ='D'; C= C + +;//An algorithm for converting uppercase letters to lowercase lettersprintf ("%c\n", c);//52 is the ASCII code of the ' 4 ' characterC='9'; //C = c-48;c = C-'0';//An algorithm for converting characters to integersprintf"%d\n", c); return 0;}intMain () {Charc ='\a'; C='a'; printf ("%c", c); C='\b'; printf ("%c", c); C='b'; printf ("%c", c); C='\ n'; printf ("%c", c); C='a'; printf ("%c", c); C='b'; printf ("%c", c); C='\ r'; printf ("%c", c); C='C'; printf ("%c", c); //c = ' \ R '; //printf ("%c", c);printf ("\ n"); C='a'; printf ("%c", c); C='\ t'; printf ("%c", c); C='b'; printf ("%c", c); C='\ ''; printf ("%c", c); CharA =0;//to define a signed charUnsignedCharb =0;//to define an unsigned charB = B-1; A=127; A= A +5; printf ("%d", a); return 0;}

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Data types in 2_c languages (v) Char