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01、算术运算符
int myNum = 100 + 50;int sum1 = 100 + 50; // 150 (100 + 50)int sum2 = sum1 + 250; // 400 (150 + 250)int sum3 = sum2 + sum2; // 800 (400 + 400)
+  加  将两个值相加  x + y
-  减  从另一个值中减去一个值  x - y
*  乘  将两个值相乘  x * y
/  除  将一个值除以另一个  x / y
%  取模  返回除法余数  x % y
++  增量  将变量的值增加 1  ++
--  乘量  将变量的值减 1  --x
02、赋值运算符
= x = 5 x = 5+= x += 3 x = x + 3-= x -= 3 x = x - 3*= x *= 3 x = x * 3/= x /= 3 x = x / 3%= x %= 3 x = x % 3&= x &= 3 x = x & 3|= x |= 3 x = x | 3^= x ^= 3 x = x ^ 3>>= x >>= 3 x = x >> 3<<= x <<= 3 x = x << 3
03、比较运算符
int x = 5;int