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Harmonyos quick start: Hello World

2022-07-19 12:24:00 【InfoQ】

Add source file

1、 newly added my_app Folder

stay . /applications/BearPi/BearPi-HM_Nano/ sample Create a new one under the path my_app Catalog , Used to store business source code files .

2、 newly added hello_world.c file

stay . / applications/BearPi/BearPi-HM_ Nano/ sample/my_app Create a new one under the path hello_world.c file , This file is the business source code file .

3、 newly added BUILD.gn file

stay ./applications/BearPi/BearPi-HM_Nano/ sample/my_app Create a new one under the path BUILD.gn file , This file compiles the script for the business source code .

Write code

#include <stdio.h>
#include &quot;ohos_init.h&quot;

void Hello_World(void)
{
 printf(&quot;Hello World!\r\n&quot;);
}
APP_FEATURE_INIT(Hello_World);

structure BUILD.gn

static_library(&quot;myapp&quot;) {
 sources = [
 &quot;hello_world.c&quot;
 ]
 include_dirs = [
 &quot;//utils/native/lit/include&quot;
 ]
}

1.static_library The compilation result of the specified business module in , For static library files libmyapp. a, The developer shall fill in according to the actual situation .

2.sources Specify a static library in . a The dependent . c File and its path , If the path contains "!1" Absolute path （ Here is the code root path ), If it doesn't include "[/" Indicates the relative path .

3.include_dirs It is specified in source What we need to rely on .h File path .