char//char = signed charsignedchar//有符号字符类型    unsignedchar//无符号字符类型

short//short = signed shortsignedshort//有符号短整型类型unsignedshort//无符号短整形类型

int//int = signed intsignedint//有符号整形类型unsignedint//无符号整形类型

long//long = signed longsignedlong//有符号长整型类型unsignedlong//无符号长整形类型

float//单精度浮点型double//双精度浮点型

int*//整形指针类型char*//字符指针类型float*//浮点型指针类型void*//空指针类型

arr[]              //数组类型 struct//结构体类型enum//枚举类型union//联合类型

void//void表示空类型  通常应用于函数的返回类型、函数的参数、指针类型

#define _CRT_SECURE_NO_WARNINGS 1#include<stdio.h>voidestimate(intx)
{
if (x==1)
    {
printf("小端");
    }
else    {
printf("大端");
    }
}
intmain()
{
inta=1;
char*p= (char*)&a;
estimate(*p);
return0;
}