c_cpp 测试主机字节序，大端，小端，大端，小端

Posted 2021-05-14

#include <stdio.h>
int main()
{
    int test = 0x12345678;
    char* testp = (char*)&test;
    for (int i = 0; i < 4; i++)
    {
        printf("0x%x\n", (int)(*(testp++)));
    }
    if ((int)(*(--testp)) == 0x78)
    {
        printf("The host is：Big-Endian\n");
    }
    else if ((int)(*(testp)) == 0x12)
    {
        printf("The host is：Little-Endian\n");
    }
    else
    {
        printf("Program error or unknown endian\n");
    }
    return 0;
}