英语词汇
unary 一元
syntax 句法
colon 冒号
bitwise 按位
preprocessor 预处理器
escape sequence 转义字符
universal character 通用字符
Assignment Operators 赋值运算符
Misc Operators 杂项运算符
the closing curly brace 大括号
Bitwise Operators
Bitwise operator works on bits and performs bit-by-bit operation. The truth tables for &, |,and ^ are as follows: 
&按位与，|按位或，^按位异或，~按位反。
Assume if A = 60; and B = 13; now in binary format they will be as follows:
A = 0011 1100
B = 0000 1101
A&B = 0000 1100
A|B = 0011 1101
A^B = 0011 0001
~A = 1100 0011
来看看具体的含义： 
#include <stdio.h>
main()
{
unsigned int a = 60; /* 60 = 0011 1100 */
unsigned int b = 13; /* 13 = 0000 1101 */
int c = 0;
c = a & b; /* 12 = 0000 1100 */
printf("Line 1 - Value of c is %d\n", c );
c = a | b; /* 61 = 0011 1101 */
printf("Line 2 - Value of c is %d\n", c );
c = a ^ b; /* 49 = 0011 0001 */
printf("Line 3 - Value of c is %d\n", c );
c = ~a; /*-61 = 1100 0011 */
printf("Line 4 - Value of c is %d\n", c );
c = a << 2; /* 240 = 1111 0000 */
printf("Line 5 - Value of c is %d\n", c );
c = a >> 2; /* 15 = 0000 1111 */TUTORIALS POINT
Simply Easy Learning Page 31
printf("Line 6 - Value of c is %d\n", c );
}
escape sequence
C中的转义字符：
Operators Precedence in C
Operator precedence determines the grouping of terms in an expression. This affects how an expression is evaluated. Certain operators have higher precedence than others; for example, the multiplication operator has higher precedence than the addition operator. 
