Big endian little endian: testing the native data storage form_trb331617’s blog

Little endian: the low bit of data is stored in the low address Big endian: This difference in data storage method is not caused by the operating system, but by the processor architecture. 1 #include 2 3 int main(int argc, char *argv[]) 4 { 5 int a = 0x12345678; 6 char *p = (char *)&a; 7 if(*p = 0x78) 8 printf(“little endian\n”); 9 else 10 fprintf(stdout, “big endian\n”); 11 12 return 0; 13 } 1 #include 2 3 /* Data storage form test function, big endian method returns 0, little endian method returns 1 */ 4 int test_endian(void) 5 { 6 int a = 0x12345678; // data for testing 7 char *p= (char *)&a; // Pointer converted to character data 8 9 if(*p == 0x78) // judge the order of the lowest byte 10 return 1; 11 return 0; 12} 13 14 int main(int argc, char *argv[]) 15 { 16 if(test_endian() == 1) // little endian 17 { 18 /* corresponding operation */ 19} 20 else // big endian twenty one { 22 /* corresponding operation */ twenty three } 24 return 0; 25 } Verify that the network byte order is big-endian 1 #include 2 3 int main(int argc,…