day1:
C语言{
编程规范:
#include<stdio.h> //头文件 #预处理指令
int main( ) //int (void) 返回值为 int (void) main入口函数
{
//代码块!
return 0; //void 无返回值;
}
关键字: auto; break; case; char; const; continue; default; do; double; else; enum; extern; float; for; goto; if; int; long; register; return; short; signed; sizeof; static; struct; switch; typedef; union; unsigned; void; volatile; while
数据类型: char short int long float double
存储类型(有符号 / 无符号):signed unsigned static register extern const volatile auto
语句:if else for while do goto switch case default baeak continue return
构造: union struct enum
求字节: sizeof
别名: typedef
空类型: typedef
}