System/8.md

/// 8交换两个长整型数据 
void  SwapLong(long *x, long *y)
{
long   temp;
temp = *x; 
*x = *y;  
*y = temp;
}
// 交换两个字符串 
void  SwapChar(char x[], char y[])
{
char temp[MAX_LEN];
strcpy(temp, x);
strcpy(x, y);
strcpy(y, temp);
}