判断操作系统

#include <stdio.h>
 
int main() {
    #ifdef _WIN32
        printf("Windows32\n");
     #elif __aarch64__
        printf("aarch64\n");
	#elif __x86_64__
        printf("__x86_64__\n");
	#elif __i386__
        printf("__i386__\n");
    #elif __linux__
        printf("Linux\n");
    #elif __APPLE__
        printf("MacOS\n");
    #elif __unix__ // 
        printf("Unix-like (not specified)\n");
    #else
        printf("Unknown OS\n");
    #endif
    return 0;
}