4.mty

8.md

@@ -0,0 +1,16 @@
+// 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);
+}