1 signed unsigned short long 四个修饰符.对int全部适用,对char只有signed和unsigned适用,long适用于double. 2 long int(占4个字节)因此可以写成int或者long,short int(占两个字节) 可以写成short. 3 八进制以0(零)开头,十六进制0x(零x)开头,在ASCII中\x后跟的也是十六进制数. 4 long double数据类型输出时格式符为%lf. 5 符号常量在声明时必须被赋初值,并且其值在初始化后不能改…
It was proposed by Christian Goldbach that every odd composite number can be written as the sum of a prime and twice a square. 9 = 7 + 21215 = 7 + 22221 = 3 + 23225 = 7 + 23227 = 19 + 22233 = 31 + 212 It turns out that the conjecture was false. What…