增加 打印百分比进度.

Signed-off-by: rick.chan <chenyang@autoai.com>

Common/打印百分比进度.md

@@ -0,0 +1,21 @@
+# 打印百分比进度
+
+```cpp
+#include <iostream>
+#include <unistd.h>
+
+for(int i=0; i<100; i++)
+{
+    cout<<flush<<'\r'<<"Writed: "<<i+1<<"/"<<100;
+    usleep(200000);
+}
+cout<<endl;
+```
+
+```python
+for i in range(0, 99):
+    print('\rWrited: %.1f%%'%(100*i/100), end = '')
+    sys.stdout.flush()
+#
+print('\rWrited: %.1f%%'%(100*100/100))
+```