关于大端小端字节序的测试程序

#include <iostream> //stderr, fprintf
#include <arpa/inet.h>

using namespace std;

int main(int argc, char **argv) {
        unsigned int data = 0x19490738;
        unsigned char *str = (unsigned char *) &data;
        fprintf(stderr, "%x
", *str);

        // Network byte order(big endian), so big(19) is first.
        unsigned int hdata = htonl(data);
        str = (unsigned char *) &hdata;
        fprintf(stderr, "%x
", *str);

        return 0;
}

测试结果：

[biglitEndian]$ g++ -o testBigLit  testBigLit.cpp 
[biglitEndian]$ ./testBigLit 
38
19