char               //char = signed char
 signed char        //有符号字符类型    
 unsigned char      //无符号字符类型

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

 int                //int = signed int
 signed int         //有符号整形类型
 unsigned int       //无符号整形类型

 long               //long = signed long
 signed long        //有符号长整型类型
 unsigned long      //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>
void  estimate(int x)
{
    if (x == 1)
    {
        printf("小端");
    }
    else
    {
        printf("大端");
    }
}

int main()
{
    int a=1;
    char* p = (char*)&a;
    estimate(*p);
    return 0;
}