Compile a function to check whether the current system is in the big-end mode or the small-end mode.

# Include <stdio. h> int checksystem () {Union check {int I; char ch;} C; C. I = 1; Return (C. ch = 1);} int main () {int I; If (checksystem () {printf ("small port mode \ n ");} else {printf ("large port mode \ n") ;}return 0 ;}

The big-end mode is the high data index, which is stored in the low address of the memory, while the low data level is stored in the high address of the memory;

The small-end mode refers to the high data index and the high address stored in the memory.Medium, while the number
The low data level is stored in the low memory address.