Update get(a,size)12-2-1.cpp

practical_exercises/10_day_practice/day10/文件例题/三种输入格式/get(a,size)12-2-1.cpp

@@ -1,37 +1,37 @@
 
-//<EFBFBD><EFBFBD><EFBFBD><EFBFBD>12-2<><32>  <20>ú<EFBFBD><C3BA><EFBFBD>get<EFBFBD><EFBFBD>getline<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD>
+//【例12-2】  用函数get和getline读取数据。
 #include <iostream>
 using namespace std;
-//cin.get(arrayname,size)  <EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽arrayname<EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>size
+//cin.get(arrayname,size)  把字符输入到arrayname中，长度不超过size
 int main()
 {
-    //get()<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    //get()两个参数
 
-    //1.<EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EFBFBD><size<7A><65><EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EBB4AE>>arraylength<74><68><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD>arrayname<6D><65>С<EFBFBD><D0A1>ʹ<EFBFBD>ܱ<EFBFBD><DCB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    //1.输入串长<size，输入串长>arraylength，会自动扩张arrayname大小，使能保存所有数据
 	// char a[10];
 	// cin.get(a,20);
 	// cout<<a<<endl;
     // cout<<sizeof(a)<<endl;
-    //2.<EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EFBFBD><size<7A><65><EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EBB4AE><arraylength<74><68><EFBFBD>Ѵ<EFBFBD>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD>油<EFBFBD><E6B2B9>\0<><30>
+    //2.输入串长<size，输入串长<arraylength，把串全部输入，后面补‘\0’
     // char b[10];
 	// cin.get(b,20);
-	// cout<<b<<endl;//12345<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>12345'\0<EFBFBD><EFBFBD>
+	// cout<<b<<endl;//12345，此时数组内数据为‘12345'\0’
     // cout<<sizeof(b)<<endl;
-    //3.<EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EFBFBD>>size<7A><65><EFBFBD>Ƚ<EFBFBD>ȡsize<7A><65><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><C7B4><EFBFBD>arraylength<74><68><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰarraylength-1<><31><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󲹳䡮\0<><30>
+    //3.输入串长>size，先截取size个字符，若还是大于arraylength，则自动扩张arrayname大小，使能保存所有数据
     // char c[5];
 	// cin.get(c,10);
 	// cout<<c<<endl;
     // cout<<sizeof(c)<<endl;
-    //4.<EFBFBD><EFBFBD><EFBFBD>봮<EFBFBD><EFBFBD>>size<7A><65><EFBFBD>Ƚ<EFBFBD>ȡsize<7A><65><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><D0A1>arraylength<74><68><EFBFBD><EFBFBD><EFBFBD>ѽ<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD>󲹳䡮\0<><30>
+    //4.输入串长>size，先截取size个字符，若小于arraylength，则把截取串放入数组中，最后补充‘\0’
     // char d[10];
 	// cin.get(d,5);
 	// cout<<d<<endl;
     // cout<<sizeof(d)<<endl;
     
-    //get()<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+    //get()三个参数
     /*
-        <EFBFBD>÷<EFBFBD><EFBFBD><EFBFBD>cin.get(arrayname,size,s) ?<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵽arrayname<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ﳤ<EFBFBD><EFBFBD>sizeʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD>sʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
-        ע<EFBFBD>ͣ<EFBFBD>a<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD>char a[]l<><6C><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD><EFBFBD><EFBFBD>Ϊstring<6E><67><EFBFBD>ͣ<EFBFBD>sizeΪ<65><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>볤<EFBFBD>ȣ<EFBFBD>sΪ<73><CEAA><EFBFBD>ƣ<EFBFBD><C6A3><EFBFBD><EFBFBD><EFBFBD>s<EFBFBD><73><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>s<EFBFBD><73><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+        用法：cin.get(arrayname,size,s) ?把数据输入到arrayname字符数组中，当到达长度size时结束或者遇到字符s时结束
+        注释：a必须是字符数组，即char a[]l类型，不可为string类型；size为最大的输入长度；s为控制，遇到s则当前输入结束缓存区里的s不会被舍弃
 
     */
     int i;