sdvcrx

mysqldump -u root -p linuxcast > linuxcast_backup.sql

mysql -u root -p linuxcast < linuxcast_backup.sql

sdvcrx

#include <stdio.h>

int main(void)
{
    int a = 0x80000000;
    printf("os is %d\t%d\n", a, sizeof(int));
    union ut {
        short s;
        char c[2];
    } u;

sdvcrx

void inplace_swap(int *x, int *y)
{
    *y = *x ^ *y;
    *x = *x ^ *y;
    *y = *x ^ *y;
}