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#define my_sizeof(type) ((char *)(&type+1)-(char*)(&type))

同时大小端测试 如下

#include 
   
    #include 
    
     #define my_sizeof(type) ((char *)(&type+1)-(char*)(&type))int main(void){    unsigned int u32RawData;    unsigned char *pu8CheckData;    u32RawData = 0x11223344; //Assign data        printf("%ld\n", my_sizeof(u32RawData));     printf("%p\n", (&u32RawData+1 - &u32RawData));     printf("%p\n", (char*)(&u32RawData+1)-(char*)(&u32RawData));     printf("%p\n", (char*)(&u32RawData));     pu8CheckData = (unsigned char *)&u32RawData; //Type cast    if (*pu8CheckData == 0x44) //check the value of lower address    {        printf("little-endian");    }    else if (*pu8CheckData == 0x11) //check the value of lower address    {        printf("big-endian");    }    return 0;}
    
   

在x86平台测试是小端模式