发布于 2015-07-14 13:21:44 | 274 次阅读 | 评论: 1 | 来源: 网络整理
Jerry 提交第一个版本的代码。但他认为,他应该写两个函数接受输入和显示阵列的内容。修改后array.c 的样子。
#include <stdio.h>
#define MAX 16
void accept_input(int *arr, int n)
{
int i;
for (i = 0; i < n; ++i)
scanf("%d", &arr[i]);
}
void display(int *arr, int n)
{
int i;
for (i = 0; i < n; ++i)
printf("|%d| ", arr[i]);
printf("n");
}
int main(void)
{
int i, n, arr[MAX];
printf("Enter the total number of elements: ");
scanf("%d", &n);
printf("Enter the elementsn");
accept_input(arr, n);
printf("Array has following elementsn");
display(arr, n);
return 0;
}
Jerry 编译和测试自己的代码,并准备提交修改。在此之前,他希望使用以下命令查看更改。
[jerry@CentOS trunk]$ svn diff
上面的命令将产生以下结果
Index: array.c
===================================================================
--- array.c (revision 2)
+++ array.c (working copy)
@@ -2,6 +2,24 @@
#define MAX 16
+void accept_input(int *arr, int n)
+{
+ int i;
+
+ for (i = 0; i & n; ++i)
+ scanf("%d", &arr[i]);
+}
+
+void display(int *arr, int n)
+{
+ int i;
+
+ for (i = 0; i < n; ++i)
+ printf("|%d| ", arr[i]);
+
+ printf("n");
+}
+
int main(void)
{
int i, n, arr[MAX];
@@ -10,15 +28,10 @@
scanf("%d", &n);
printf("Enter the elementsn");
+ accept_input(arr, n);
- for (i = 0; i < n; ++i)
- scanf("%d", &arr[i]);
-
printf("Array has following elementsn");
- for (i = 0; i < n; ++i)
- printf("|%d| ", arr[i]);
-
- printf("n");
+ display(arr, n);
return 0;
}
对于新添加的行颠覆显示+符号, - 符号前行为删除行的显示。Jerry 尝试提交更改,使用下面的命令:
[jerry@CentOS trunk]$ svn commit -m "Add function to accept input and to display array contents"
上面的命令将产生以下结果
Sending trunk/array.c
svn: Commit failed (details follow):
svn: File or directory 'array.c' is out of date; try updating
svn: resource out of date; try updating
Subversion是不允许Jerry 提交的变化,因为Tome已经修改了库和Jerry的工作拷贝是过时了。为了避免覆盖对方的变化颠覆这个操作失败。Jerry必须更新的工作副本之前提交自己的修改。于是,他用update命令
[jerry@CentOS trunk]$ svn update
G array.c
Updated to revision 3.
Subversion 显示文件名前G 字母,这意味着此文件已被合并。
[jerry@CentOS trunk]$ svn diff
上面的命令将产生以下结果
Index: array.c
===================================================================
--- array.c (revision 3)
+++ array.c (working copy)
@@ -2,6 +2,24 @@
#define MAX 16
+void accept_input(int *arr, int n)
+{
+ int i;
+
+ for (i = 0; i < n; ++i)
+ scanf("%d", &arr[i]);
+}
+
+void display(int *arr, int n)
+{
+ int i;
+
+ for (i = 0; i < n; ++i)
+ printf("|%d| ", arr[i]);
+
+ printf("n");
+}
+
int main(void)
{
int i, n, arr[MAX];
@@ -15,15 +33,10 @@
}
printf("Enter the elementsn");
+ accept_input(arr, n);
- for (i = 0; i < n; ++i)
- scanf("%d", &arr[i]);
-
printf("Array has following elementsn");
- for (i = 0; i < n; ++i)
- printf("|%d| ", arr[i]);
-
- printf("n");
+ display(arr, n);
return 0;
}
Subversion是只显示Jerry 的变化。但array.c的文件合并,如果观察仔细Subversion的现在修订号为3,在以前的输出显示修订号为2。只要审查文件中的变化和目的是什么。
jerry@CentOS trunk]$ svn log
------------------------------------------------------------------------
r3 | tom | 2013-08-18 20:21:50 +0530 (Sun, 18 Aug 2013) | 1 line
Fix array overflow problem
------------------------------------------------------------------------
r2 | jerry | 2013-08-17 20:40:43 +0530 (Sat, 17 Aug 2013) | 1 line
Initial commit
------------------------------------------------------------------------
r1 | jerry | 2013-08-04 23:43:08 +0530 (Sun, 04 Aug 2013) | 1 line
Create trunk, branches, tags directory structure
------------------------------------------------------------------------
现在,Jerry's 工作副本与存储库同步,他可以放心地提交他的变化。
[jerry@CentOS trunk]$ svn commit -m "Add function to accept input and to display array contents"
Sending trunk/array.c
Transmitting file data .
Committed revision 4.